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94-100643-UP; 94-100635-CO; 93-103113-PC`c- s P.O. BOX 1031 - PUYALLUP, WA 98371-0255 PUY: (206) 845-8833 SEA: (206) 838-3474 FAX: (206) 841-1734 DRAINAGE STUDY I FOR RON BUTZ NEW OFFICE BUILDING SITE 4�5 pe q q- 0019 6 LOCATED IN THE NE 1/4 OF SEC 25, TWN 21 N, RGE 3 E, WM BY: SEC CHECKED: JFN DATE: 3/9/94 JOB #: 94-3543 S F WAS MY A% T E f! AL 191 ExPlaBs 10-25 -95 CORE REQUIREMENTS #1 Site is in a developed area. Concentrated flow will be discharged to the existing storm system in 21st Ave: SW. #2 Off -site analysis - see "Downstream Analysis," no problems noted in existing storm drainage nor system. floodplain, no sensitive Not in critical drainage area, wetlands. soil type AgB, Alderwood, in Hydrologic areas, nor Soils Group "C". #3 Biofiltration swale to detention pipe and pond with orifice structure sized for 2 and 10 year, 24 hour storms, overflowing the 100 year 24 hour storm. #4 Pipes sized for 25 year, 24 hour storm with 0.5 feet minimum freeboard in all catchbasins. #5 Erosion and Sedimentation Control devices: Permanent detention system shall be used for sediment trap, and will be cleaned thoroughly when construction is completed. Other measures to be utilized are silt fence, temporary construction entrance, revegetation of disturbed areas as soon as is practical, and Construction sequence indicating timing of construction and placement of temporary erosion and sedimentation control measures. #6 Maintenance and Operation - site and facilities will be privately owned and maintained. #7 Owner shall put up required bonds - see worksheet. SPECIAL REQUIREMENTS #1 Exempt - not in critical drainage area. #2 Exempt - no Master Drainage Plan. #3 Exempt - no Community Plan, or PUD, less than 500 acres cleared. #4 Exempt - no Basin or Community Plan. #5 Exempt - less than 1 acre (0.806 acres). #6 Exempt - less than 5 acres. #7 Exempt - no discharge to closed depression. #8 Exempt - no use of lakes, wetlands, or closed depressions. #9 Exempt - site does not abut nor contain stream, lake, wetland, nor closed depression. #10 Exempt - site does not contain nor abut class 1 or 2 stream. #11 Exempt - no steep slopes or high berms. #12 Exempt - soils are mapped (AgB, Alderwood). 11 TECHNICAL INFORMATION REPORT TABLE OF CONTENTS I. Project Overview II. Preliminary Conditions Summary III. Off -Site Analysis IV. Retention/Detention Analysis and Design V. Conveyance Systems Analysis and Design VI. Special Reports and Studies VII. Basin and Community Planning Areas VIII. Other Permits Ix. Erosion/Sedimentation Control Design X. Bond Quantities Work, Retention/Detention Facility Summary Sheet and Sketch, and Declaration of Covenant RI. Maintenance and Operations Manual I. PROJECT OVERVIEW The 0.806 acre site is currently undeveloped, with a ground cover of deciduous and evergreen trees, and brush. Soils are Alderwood, AgB. Natural drainage is sheet and shallow concentrated flow from south to north across the site. There is an existing storm system in 21st Avenue SW which abuts the site on the west. This project proposes construction of approximately 14,140 square feet of impervious area, with an office building and paved parking area. The eastern half of the site will remain undisturbed, and will not be considered in drainage calculations as it will not contribute to the developed area. Increased runoff from the site will be treated with a biofiltration Swale, stored in a detention pipe and pond, and released at a controlled rate through an orifice structure to the existing storm system in 21st Avenue SW. . Page 1 of 2 King County Building and Land Development Division ` TECHNICAL INFORMATION REPORT (TIR) WORKSHEET I PART1 PROJECT OWNER AND PROJECT ENGINEER Project Owner Ron Butz Address1911 SW Campus Dr. m353, FW Phone � 206) 952-6151 Project Engineer James F. Nims Company Bennett P S & E Address Phone 206 83 -3474 PART 3 TYPE OF PERPAir APPLICATION j_ Subdivision I (� Short Subdivision I Grading x Commercial Other PART 2 PROJECT LOCATION D DESCRIPTION Project Name Ron Butz Office Building ' Location Township L 1 " Range 3 E Section Project Size 0.806 Upstream Drainage Basin Size . DOF/G HPA COE 404 L� DOE Dam Safety FEMA Floodplain = COE Wetlands PART 5 SITE COMMUNITY AND DRAINAGE BASIN Community Drainage Basin C] River Stream C Critical Stream Reach Depressions/Swales Lake — Steep Slopes Lakeside/Erosion Hazard PART T SOILS Soil Type Alderwood Floodplain Wetlands Seeps/Springs High Groundwater Table Groundwater Recharge Other A46AC Shoreline Management Rockery Structural Vaults Other HPA Slopes Erosion Potential Erosive Velocities 2 - 6% Additional Sheets Attatched 1 1/90 Page 2of2 King County Building and Land Development Division TECHNICAL INFORMATION REPORT (TIR) WORKSHEET REFERENCE Ch.,' - Downstream Ana_tysis Additional Sheets Attatched LIMITATION/SITE CONSTRAINT MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION Sedimentation Facilities Stabilized Construction Entrance Perimeter Runoff Control Clearing and Grading Restrictions Cover Practices Construction Sequence Other None MINIMUM ESC REQUIREMENTS FOLLOWING CONSTRUCTION ® Stabilize Exposed Surface Q Remove and Restore Temporary ESC Facilities ?� Clean and Remove All Silt and Debris Ensure Operation of Permanent Facilities Q Flag Limits of NGPES Q Other Q Grass Lined Channel Tank Q Infiltration Method of Analysis Pipe System Q Vault Q Depression SBUH Open Channel �. Energy Dissapator Q Flow Dispersal Compensation/Mitigation Q Dry Pond Wetland Q Waiver of Eliminated Site Storage Q Wet Pond Stream 0 Regional Detention Brief Description of System Operation Water collected in paved area: to 100 LF bio-swa e to 100 LF detention pipe and pond: control structure outlet to existin' turn in 21st: Facility Related Site Limitations Ave SW. Q Additional Sheets Attatched Reference Facility Limitation 0 Rockery > 4' High Q Structural on Steep Slope I or a civil engineer under fny supervision have visited the site. Actual site conditions as observed were incorporated into this worksheet and the attatchments. To the best of my knowledge the information provided here is accurate. Q Drainage Easement 1 Q Access Easement Q Native Growth Protection Easement Q Tract Q Other signs"re 1/90 t: i ra •�'�.T� A. •ati Cry �� T: - `' .�: o-tl • •.� � ; Ire+ � "`F�.� .•��•�� ` � y �Jf� �� ' � t � r � �•:.1� w I Al ,�• �:,� :�,•c .,tr., � �`.:;.,,�� i-i�`;';:'•T.L`« �-ry'4ti7.rz.,6. �:. _ l/.� ♦l _ `��' I"r•!1i `.�145� .Ca 1y'�.�,i;• �Oi+A�. ��i .�fj, x-,� , 1 !` �_, IM _ �` it• '�." r�-:,rt:, "pia' �1�'� fl*�V/Mol.? ;,�,:Qg �;• t�I,: '' - - Ali _�:.,. ��3 �• �� . �� f�• :i _� 7��. � _ �• . i � V �+� �r- v'- - ✓�� max+ r+. �•^' ..`- '��". ��-. •'l� �-r.= `...y -_ it i r II. PRELIMINARY CONDITIONS SUMMARY N/A III. OFF -SITE ANALYSIS Upstream tributary area is 4.463 acres, type "C" soils. The land use for 0.757 acres of this tributary area is housing with a density of 6.6 DU/GA, and a CN of 92. A commercial site occupies about 0.516 acres, with a CN of 95. The total upstream impervious area is 1.273 acres with an average CN of 93. The remaining 3.190 acres of tributary area is forested with a CN of 81. The average slope of this subbasin is about 2.7%. The tributary area is cut off by SW 356th Street. j i / a t Gw� a� on S GA 4.4 3 H o S /o �n-��e�viovs civ— g8� 4to % 14,vL5 c,v = (0.457¢K963) f�v.4(6 92 (Cti = AVJ CAI = (0.'7 SX- 93) +- �0, 2s Y- -rD'-� 1 h'? P eKv IOU5 OFf--SLtL,`�"i�ll b �.c L� ✓� 2 i J L of f-5 Lam. rn,oervi'ovs C lV �, 7s7 (9Z) + D. 5! to C 95 3 C N = S 1 (y aur�j second KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL (2) CN values can be area weighted when they apply to pervious areas of similar CN's (within 20 CN points). However, high CN areas should not be combined with low CN areas (unless the low CN areas are less than 15% of the subbasin). In this case, separate hydrographs should be generated and summed to form one hydrograph. FIGURE 3.5.ZA HYDROLOGIC SOIL GROUP OF THE SOILS IN KING COUNTY SOIL GROUP HYDROLOGIC GROUP* C C ! SOIL GROUP Orcas Peat Oridia HYDROLOGIC 1 GROUP* D I D C Alderwood Arents, Alderwood Material Arents, Everett Material B C Ovall Pilchuck C Beausite D Puget D Bellingham D Puyallup B Briscot D Ragnar I Buckley Coastal Beaches Variable Renton D Variable Earlmont Silt Loam D Riverwash C Edgewick C A B Salal '-Sammamish D Everett A Seattle D Indianola C Shacar D Kitsap C Si Silt C Klaus Mixed Alluvial Land Variable Snohomish D C Neilton A Sultan Newberg B C Tukwila Urban Variable Nooksack Normal Sandy Loam D Woodinville D HYDROLOGIC SOIL GROUP CLASSIFICATIONS A. (Low runoff potential). Soils having high infiltration rates, even when thoroughly wetted, and consisting chiefly of deep, well -to -excessively drained sands or gravels. These soils have a high rate of water transmission. B. (Moderately low runoff potential). Soils having moderate infiltration rates when thoroughly wetted, and consisting chiefly of moderately fine to moderately coarse textures. These soils have a moderate rate of water transmission. C. (Moderately high runoff potentiai). Soils having slow infiltration rates when thoroughly wetted, and consisting chiefly of soils with a layer that impedes downward movement of water, or soils with moderately fine to nine textures. These soils have a slow rate of water transmission. D. (High runoff potential). Soils having very slow infiltration rates when thoroughiy wetted and consisting chiefly of clay soils with a high swelling potential, soils with a permanent high water table. soils with a hardpan or clay layer at or near the surface, and shallow soils over nearly impervious material. These soils have a very slow rate of water transmission. From SCS, TR-55, Second Edition, June 1986, Exhibit A-1. Revisions made from SCS, Soil Interpretation Record, Form #5, September 1988. g�� 3.5.2-2 11/92 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TABLE 3.51B SCS WESTERN WASHINGTON RUNOFF CURVE NUMBERS SCS WESTERN WASHINGTON RUNOFF CURVE NUMBERS (Published by SCS in 1982) Riinnff rlirva numhare fnr ealartarl anrirultnral cnhnrhan and iirhan lanri IISP fnr Tvna 1A rainfall distribution, 24-hour storm duration. CURVE NUMBERS BY HYDROLOGIC SOIL GROUP LAND USE DESCRIPTION A B C D I Cultivated land(1) winter condition k 86 91 94 95 Mountain open areas: low growing brush and grasslands jl 74 I 82 89 92 1 Meadow or pasture: 65 78 85 89 I Wood or forest land: undisturbed or older second growth 42 64 76 81 Wood or forest land: young second growth or brush 55 72 81 86 Orchard: with cover crop 81 88 94 ,-Open spaces, lawns, parl(s, golt courses, cemeteries, landscaping. good condition: grass cover on 75% or more of the area fair condition: grass cover on 50°% to 75°% of the area Gravel roads and parking lots Dirt roads and parking lots Impervious surfaces, pavement, roofs, etc. Open water bodies: lakes, wetlands, ponds, etc. Single Family Residential (2) Dwelling Unit/Gross Acre °% Impervious (3) 1.0 DU/GA 15 1.5 DU/GA 20 2.0 DU/GA 25 2.5 DU/GA 30 3.0 DU/GA 34 3.5 DU/GA 38 4.0 DU/GA 42 4.5 DU/GA 46 5.0 DU/GA 48 5.5 DU/GA 50 6.0 DU/GA 52 6.5 DU/GA 54 7.0 DU/GA 56 Planned unit developments, % impervious condominiums, apartments, must be computed commercial business and industrial areas. 68. 8o (86 90 77 85 90 92 76 85 89 91 72 82 87 89 l 98 98 98 98 100 100 100 100 Separate curve number shall be selected for pervious and impervious portion of the site or basin (1) For a more detailed description of agricultural land use curve numbers refer to National Engineering Handbook, Section 4, Hydrology, Chapter 9, August 1972. (2) Assumes roof and driveway runoff is directed into street/storm system. (3) The remaining pervious areas (lawn) are considered to be in good condition for these curve numbers. 3.5.2-3 11/92 X f� Q �, V 6 x 402•3 402• / 9 11 387'0 3g3.6 34X? y .7 X X X X r.5 3g8� i 388X N i X x4p0.6 } :.9• 1 1 390.8 X 2 X 396.9 � 403.5 387. •X 3g2.5 x Ln 3 X'9 X 386.7 385.5 386.1 X 400.g 97.7 395 9 4p3.6 X 1` 390.7 xel/ x J 403.4 X 399.t 39 405.9 5 e X 400.4 9.2 x 3g5.5 1` 5 4p1.X x394 7.406.4 404.5 X� J l 88.6 / X X 396.9 403-= X J 390.3 4 340.1 X X 2.2 X7 X 393.3 3g1.9 X 1 1 X 391.X 402.3 3g7.X X 8 1.9 401.3 39 .2 _ �l X X 4�• 402• X X } I 403.4 X 398 C 397.9 401.9 X 401% IF X Xe0XIDPIE 40t .5 X X 392.2 3g1 t I I5 395.7 403.2 r rQ� / � �X � X j1 405.1 396. X 391.0 x 6 3 2 'I X 398 3 401.4 401.5 )(403.6 g X8 X 403X X 405.6 9a. X0 x 398.1 4�5 � 40t.1 398.4 r•' ._ 6 395.6 A 406.1 392.4 f � ' 404• X 4o3.3 4p5X )' 3g7 2 35 3X t 39X7 ` Iy�e X400.8 O)c 399.2 405• X 403.3 X `4 396.5 �� , A X 40 a X 403.1 7K 405.5 ' x 401.8 401401.9 407. .5 04.3 X 393.6 393.2 6.16 �40X0.6 X 400 394.4X x 0402.- 3 396.1 92.3 1 % O `pX2 X X 395.7 X 40,56 402.8 X x t.5 4.4 0406 % 401.4 �. ' 404.1 395.1 394.6 39 X 7t 402.9 X �( g6.4 YO X 93.5 401.4 7 X X 404.7 X x403.5 *A 4 9 403.6 s , ' 3 x a03. f X 404.6 x X X 4p4.� 406.4 X 4 X 63 X I 394 6 X 3g7. X 4,00.1 402.5 405 r/ .7 x4039 4Xp6.4 40 X X jj� 407 7 4041 x 6 3g6.9 398. 4 } 404.5x .4 f X 406.9 X 402.5 �[ X 400• X j96.4 395. X 396.1 X 4{y27 X 404 404 X X 396.5 9fi 4 r 6 406.9 405.1 406.4 X X x 397.6 405.9 406.8 7.3 397.5 399 400.3 401.5 1 X X 405-s - 3g5.2 X X X 40D.9 407.7 X l X 407.6 X 397X '� 3g9.1 X / 405.9 x 407 t X X X 07.1 1,5 x 4 396.9 3g7.4 400.4 40 X �X 2 X $.W. 356" N ST 397• 7 '599.3 X 407.0 l � 3g7• 398. X398.4 x3 8' JK X cjC 5 4 � f 397.7 398.5 X 403.8 4a2.7 X x hh x x l401.6 399.4 401.9 � 398.1 395.4 398.2 X 411.3 412•t a.9 406.Sj� X X X 979 X X X X • 3g8. 3 X f 8 398.5 X 402.2 a 412.3 X 3g9.5 X 398 0 X X LA X X 4t1.6 X 3989 X X a`7.2 398.3 398.0 3gg.0 X X 40 d � X 412.5 X 00.9 � 400.0 409.2 X 395.9 X 1 4p8-2 X X V9.3 398.9A X X 3gg.3 399.5 1 4tt,6 409-5 09 401.0 7c 39 X �\ X X X X Y j29.5 le-1 A-n9.0 f r- •. -may ' 'rF e•' - - - �-. r i\ .� ,i 1• I� � /}�~ ~~ ,�_• y`�� TL �L - _ ��jQJI .5 Lr� ,'` •��7 - _C �. �^ T 14�+ .--;~ }�.,:'-'S;i' ~i-��'4 I __1 I ' I I # •II r I` GF d � F• -I y�41f • raj �� %♦� S L.�vr!! .fix J y �� 'I; . _. �• •I '+ I` .:; +1 ,- � •=.tin ��~• s L' - � _,. i J 4T ore .tS-.. d.. _ - TMl:tr► 1 t x��.,� �� '•�• j• � _ r .1� ��,'�; .— .•ram 7 �_ '" Iej w 'i �•{jam �'a1Llt .T' 1 i q!! .1� I 3+'t. Fib '� ri_ 1 / � Y'i ■ni 3'/ �}� • - �' -� ,�_ � •, wr �-n i•ir / • ++may r/ r* � i�-'Y -• Lt 1 T it . t r rtk 1. � t � • _ _ f 4,4 sy•a. _ a L� ri DOWNSTREAM ANALYSIS 21st AVE. SW CB #1 (at Butz property, west side of 21st Ave. SW) Rim = 389.0 IE = 383.6 300 LF 36" conc. pipe sloping down to the north at 1.03% CB #2 Rim = 385.72 IE = 380.52 300 LF 36" conc. pipe sloping down to the north at 1.16% CB #3 Rim = 382.22 IE = 377.04 300 LF 36" conc. pipe sloping down to the north at 2.97% CB #4 Rim = 374.42 IE = 368.12 354 LF 36" conc. pipe sloping down to the north at 0.74% CB #5 Rim = 371.70 IE = 365.50 315 LF 36" conc. pipe sloping down to the north at 2.61% CB #6 Rim = 363.58 IE = 357.28 No restrictions or flooding problems were observed. Date visited: February 25, 1994 Weather: overcast/showers IV. RETENTION/DETENTION ANALYSIS AND DESIGN On -site subbasin, existing condition - 0.398 acres, young forest, HSG "C", CN=81 On -site subbasin, developed condition - 0.325 acres paved/rooftop, CN=98, 0.073 acres landscape area, CN=86. Off -site - see section III. See Basin Summary Report for additional information such as time of concentration calculations. X X QX 385.7 �c lr QX 94 q I X Dti / �S-7-0 7.7 X 402.3 462.5 Y%L 3889N 38].6 39X X . 3g8.5 yg0.8 X 9C` 403.5 X 400.6 387.2 r X 396. f / 339.9 X . X 2.5 x L X X 1 386.7 385.5 386.1 apfi.l 7 I x � . 4,00.9 g7.7 � 39%q X 403.6 1r X I 390. X jI CON., 392.1 401.4 l / _ X 399.t IX 398- 1 X 400.9 � x 105.9 345'9 � 1.3 3g7.4 i'y95 2 X X 4p515 88.6 9. � / � X X X 4p6.4 X ` X 395.5 tt 7 yg6.9 403� X 390.3 i 390.1 4 40� X X X327.7 X 393.3 391.9 X 1 X 391. yt 402.3' X 1.9 ; 401.3 X I 89.9 39 2 X 99• 402•S X X X 403.4 X D. � v , i X X 3g7.9 401.9 4QB,r` /� . 40t.. - X I I 441.5 X X X 392 2 391.1 / 345.7,,, 403.2 1 / 4 X � ,os.1 1 1� 396,4 X X 3g1.0 � . X398.3 4 401.5 . 3.6 96.E �• �c 40 X 90.6 39X2 LAe-\)�� 4X1. X 403X 405'6 / `o 4G5 X Qj��jLSc.-+ L r 398•t z 4pt.1 4 4 L�r �J� 404.6 398.6 X X % 398 393 5 393.1 392. x X 403X 405- X 406.1 r X X x400-B X. 397.2 CX 391.7 t 3g92 405. � 403.3 X y 3 X X 405.5 X 403.1 X X 401.8 401.8 4n1.9 393.6 393.2 X 401.5 404-3 3407.6 j X 1 3g4.4 X X 1 X X 406.fi y� X X 92.3 fr 402.1 ]; 4p8.7 400.6 396.1 X X X X 3g5 7 4p1.5 X 405 6 ypx2 8 X X 402• � 4.4 X 0140�6 X 401.4 394.6 394.2 X 404.1 395-1 X X 93.5 X 4p2.9 X X X' 396.4 X 3 401.4 406 . X 4p4.7 X X4g3.5 ` 4Xp6.1 4O6 9 403.6 L' .3 1 a07 x 404.6 is X X 4p4 = r 394.6 397.4 &00•'• ;02.5 405 .7 X 403 9 4068 X 406.4 X X X i X X X X X 4p6.4 407.7 x 39B.6 X 40D9 X 4C41t l 6-406. 5 5.5 }� 1 399 X 400.4 f 404.5 4 W5 9 AL -'796.4 X 4 39 xX 396• X-L X 4404 ° X X 396.5 X X 397.6 96.4 6 4p6.4 397.3 4p6.9 j05.t X 4.05.9 407\ X . 39 8 399.4 40t.5 x 406.8 X 405.6 395.2 X 400.3 4034077 . 4X X 07.6 X 397. 3g9'1 x 4p5.9 407.1 X X 407.1 % X 397.4 X 404.2 X X 3969 X X 35�t S7. 397.4 .400.4 402.9 S.VJ. .594.3 X 7.0 1 7 397-5 .8 X 398.4 39X 398 X X 4 397 398.5 X X 4p3.8 7 4p2. X i 1 X � 6 4 401.s X X 1 3q8 1 398.4 39B.2 399. X 411.3 412.1 4�1.9 4p6. X X X X X X X 398.9 397.9 X i. 5 0O 402.- 412.3 405 X 39B• X '' 3995 X 398.0 X X X X � ti 411.6 0 X 3 398 p 398.9 X C7.2 396. 399.0 X X x 40 b 412.5 % 400.0 X i 409.2 \ 398.9 X I 3y9.3 , 399.9A X 399.3,` ^ 399.5 3408 X f 9 0 X / _ X , 41 X 40 9.5 S X x F.Y. BOT. s8t.00 jSL.F., fP" ¢ � C 6. rvjoc .r-54" !�5=0.0 7: R%Af = i eJl5r 5AA! 5. AW /•E. �1P� r3B5.G0 1 R/M =387.36 � t �EI.Rl3E1� \ /• E.t/3G~) ' '184. 00 379.41 1 as 4X, IZI146 cas=o.o y. fOOG.F 3G-46dErCAWOrvpfpa�s=o.00=: p ~ , 1V. 89�2B gg ��=��;ref 1 1 �pyO- ��a--•- �w'+ /� f00 L .F 8/OF/1-TRAT/0N sw,4i- E / } W too' L H j 18' f2 fPl f2' ' ! Z 40' Qtp 2A 1 387.60 � B2 Ire" Lip S = .d �'� 1 / 2B' 22' W. 260.96' �Y y r.� ._.r++ J F.� �,:- 'r'-� •� '""y" •fir., `� �� VMS Nt_ impZIA- .... I _� .•ram � _ y�� _ h:= �..gww .'• .1 � a. r:i�A�J3'C!/ � ti•- :�{;tie �`X'r:�;�:;�{+;y.." ILL� - 'J f• �-- � i J r4 EPA rTlF'; pb �� E I Iry w r� E} t !.� _ � _ F i +i'�l• 'L� t �.. �': �•Y'. 7ii�f f 1 .,� � fi � r _•:•�i:� ,�. T i : �. � �.:`.�s-d! tea. �a� r��. y ;.. -� '• .i� ,i •i is � / FF �� — ,." !- .�� •• - is^- �� i I � �. �lV'�'f.' � •� L},•' � , _ � ,''�• ,l•'i! r�if' ;� �. Firs 1 � � i' �'tiS,�� +'� �. r ate. }:Y �� i i ' � . � _ L,_ _ _ ...�„t • � "� �' ,�.' .� �- .• _ •��.'�-•. "rye'' � � z��Y cti �{ " llk, �, c *. �� • Ai � � 1. •-.� S � ='7 .� z 3/13/94 Bennett PS & E page 4 BASIN SUMMARY BASIN ID: 2D NAME: 2 YEAR DEVELOPED CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPE1A PERVIOUS AREA PRECIPITATION....: 2.13 inches AREA..: 0.07 Acres TIME INTERVAL....: 10.00.min CN....: 86.00 TIME OF CONC.....: 3.48 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.33 Acres CN..... 98.00 TcReach - Sheet L: 110.00 ns:0.0110 p2yr: 2.13 s:0.0100 TcReach - Channel L: 107.00 kc:42.00 s:0.0040 TcReach - Channel L: 100.00 kc:17.00 s:0.0200 PEAK RATE: 0.16 cfs VOL: 0.06 Ac-ft TIME: 470 min BASIN ID: 2E NAME: 2 YEAR EXISTING CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPE1A PERVIOUS AREA PRECIPITATION....: 2.13 inches AREA..: 0.40 Acres TIME INTERVAL....: 10.00 min CN....: 81.00 TIME OF CONC.....: 44.15 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.00 Acres CN....: 98.00 TcReach - Sheet L: 135.00 ns:0.8000 p2yr: 2.13 s:0.0400 PEAK RATE: 0.03 cfs VOL: 0.02 Ac-ft TIME: 490 min BASIN ID: 2OS NAME: 2 YEAR OFF -SITE SBUH METHODOLOGY TOTAL AREA.......: 4.46 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPEIA PERVIOUS AREA PRECIPITATION....: 2.13 inches AREA..: 3.19 Acres TIME INTERVAL....: 10.00 min CN....: 81.00 TIME OF CONC.....: 109.71 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 1.27 Acres CN....: 93.00 TcReach - Sheet L: 300.00 ns:0.8000 p2yr: 2.13 s:0.0270 TcReach - Shallow L: 350.00 ks:3.00 s:0.0270 PEAK RATE: 0.32 cfs VOL: 0.34 Ac-ft TIME: 550 min 91 3/13/94 Bennett PS & E page 2 BASIN ID: 10D SBUH METHODOLOGY TOTAL AREA........ RAINFALL TYPE....: PRECIPITATION....: TIME INTERVAL....: TIME OF CONC.....: ABSTRACTION COEFF: BASIN SUMMARY NAME: 10 YEAR DEVELOPED CONDITION 0.40 Acres BASEFLOWS: 0.00 cfs TYPE1A PERVIOUS AREA 2.97 inches AREA..: 0.07 Acres 10.00 min CN..... 86.00 3.48 min IMPERVIOUS AREA 0.20 AREA..: 0.33 Acres TcReach - Sheet L: 110.00 TcReach - Channel L: 107.00 TcReach - Channel L: 100.00 PEAK RATE: 0.23 cfs VOL: CN..... 98.00 ns:0.0110 p2yr: 2.13 s:0.0100 kc:42.00 s:0.0040 kc:17.00 s:0.0200 0.08 Ac-ft TIME: 470 min BASIN ID: 10E NAME: 10 YEAR EXISTING CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPE1A PERVIOUS AREA PRECIPITATION....: 2.97 inches AREA..: 0.40 Acres TIME INTERVAL....: 10.00 min CN....: 81.00 TIME OF CONC.....: 44.15 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.00 Acres CN.... 98.00 TcReach - Sheet L: 135.00 ns:0.8000 p2yr: 2.13 s:0.0400 PEAK RATE: 0.06 cfs VOL: 0.04 Ac-ft TIME: 490 min BASIN ID: 10OS NAME: 10 YEAR OFF -SITE SBUH METHODOLOGY TOTAL AREA.......: 4.46 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPE1A PERVIOUS AREA -PRECIPITATION....: 2.97 inches AREA..: 3.19 Acres TIME INTERVAL..... 10.00 min CN..... 81.00 TIME OF CONC.....: 109.71 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 1.27 Acres CN....: 93.00 TcReach - Sheet L: 300.00 ns:0.8000 p2yr: 2.13 s:0.0270 TcReach - Shallow L: 350.00 ks:3.00 s:0.0270 PEAK RATE: 0.61 cfs VOL: 0.58 Ac-ft TIME: 540 min 3/13/94 Bennett PS & E page 3 BASIN SUMMARY BASIN ID: 25D NAME: 25 YEAR DEVELOPED CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPElA PERVIOUS AREA PRECIPITATION....: 3.43 inches AREA..: 0.07 Acres TIME INTERVAL....: 10.00 min CN....: 86.00 TIME OF CONC.....: 3.48 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.33 Acres CN..... 98.00 TcReach - Sheet L: 110.00 ns:0.0110 p2yr:2.13 s:0.0100 TcReach - Channel L: 107.00 kc:42.00 s:0.0040 TcReach - Channel L: 100.00 kc:17.00 s:0.0200 PEAK RATE: 0.27 cfs VOL: 0.10 Ac-ft TIME: 470 min BASIN ID: 25E NAME: 25 YEAR EXISTING CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPElA PERVIOUS AREA PRECIPITATION....: 3.43 inches AREA..: 0.40 Acres TIME INTERVAL....: 10.00 min CN....: 81.00 TIME OF CONC.....: 44.15 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.00 Acres CN....98.00 TcReach - Sheet L: 135.00 ns:0.8000 p2yr:2.13 s:0.0400 PEAK RATE: 0.08 cfs VOL: 0.05 Ac-ft TIME: 490 min BASIN ID: 250S NAME: 25 YEAR OFF -SITE SBUH METHODOLOGY TOTAL AREA.......: 4.46 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPElA PERVIOUS AREA PRECIPITATION....: 3.43 inches AREA..: 3.19 Acres TIME INTERVAL....: 10.00 min CN....: 81.00 TIME OF CONC.....: 109.71 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 1.27 Acres CN....: 93.00 TcReach - Sheet L: 300.00 ns:0.8000 p2yr: 2.13 s:0.0270 TcReach - Shallow L: 350.00 ks:3.00 s:0.0270 PEAK RATE: 0.78 cfs VOL: 0.72 Ac-ft TIME: 540 min 3/13/94 Bennett PS & E page 1 BASIN SUMMARY BASIN ID: 100D NAME: 100 YEAR DEVELOPED CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPElA PERVIOUS AREA PRECIPITATION....: 4.32 inches AREA..: 0.07 Acres TIME INTERVAL..... 10.00 min CN..... 86.00 TIME OF CONC.....: 3.48 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.33 Acres CN..... 98.00 TcReach - Sheet L: 110.00 ns:0.0110 p2yr: 2.13 s:0.0100 TcReach - Channel L: 107.00 kc:42.00 s:0.0040 TcReach - Channel L: 100.00 kc:17.00 s:0.0200 PEAR RATE: 0.35 cfs VOL: 0.13 Ac-ft TIME: 470 min BASIN ID: 100E SBUH METHODOLOGY TOTAL AREA.......: RAINFALL TYPE....: PRECIPITATION....: TIME INTERVAL....: TIME OF CONC.....: ABSTRACTION COEFF: NAME: 100 YEAR EXISTING CONDITION 0.40 Acres BASEFLOWS: 0.00 cfs TYPElA PERVIOUS AREA 4.32 inches AREA..: 0.40 Acres 10.00 min CN....: 81.00 44.15 min IMPERVIOUS AREA 0.20 AREA..: 0.00 Acres TcReach - Sheet L: 135.00 PEAK RATE: 0.13 cfs VOL: CN....: 98.00 ns:0.8000 p2yr: 2.13 s:0.0400 0.08 Ac-ft TIME: 490 min BASIN ID: 1000S NAME: 100 YEAR OFF -SITE SBUH METHODOLOGY TOTAL AREA.......: 4.46 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE.....: TYPEIA PERVIOUS AREA PRECIPITATION....: 4.32 inches AREA..: 3.19 Acres TIME INTERVAL....: 10.00 min CN....: 81.00 TIME OF CONC.....: 109.71 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 1.27 Acres CN....: 93.00 TcReach - Sheet L: 300.00 ns:0.8000 p2yr: 2.13 s:0.0270 TcReach - Shallow L: 350.00 ks:3.00 s:0.0270 PEAR RATE: 1.14 cfs VOL: 1.01 Ac-ft TIME: 540 min 3asI to 94-3s4-5 See- f)e. ern HCr) -Vv)Jd ova Pyo e, I OD L F S a- D,S' d eOLA 2'� e, above. did s-to►� Is u�i I► z.{ f>Lvt 2o< 1 2 J O A rea. o� = cos' '��.s� , /-�= o,�� 4 FE '� Vol oC = cos ' (o,s� s� A L► 4-2) = 2. oe3 Z �1= 4-= t,Z3E3Fit Vol =Iza3(. �4 rem 3 0 1T L+ .S'�Z — 2. oc� 3 �'�L = I , 4 7 Z f -t Z Vo 1=14�, z 2 ,rem 4 = A-72 F6z Vol = 14 1, 2c.-� Ai -ems Z) Arcs to I pay E rev, pov ct Py X- Sew ``� Vol, Vol, Vn I . �rr,uj�vc, Vol LLM4 . C) ram- 29�, v O O D 364,5 4-72 - � 92cr 129c f 3214 3z1G�- _... 3 3S.o 54 + 2cAc� 1414 4M4 , 7Z2c�- 3 jDS; s v o9 147cf 434cf 1 Zo:5� 3 i3to o 9 5S 44 kk 1294 S 104 1-1764 11 C- B.-Tt'P�' �-54- R/M = - / /. E. _ .98 4.00 i1607 •382.00 SL.F., 12" � ' c6 o 7�PE -Y-54- I @ 5 a 0. 0 ff/M = r 385. G 0 II USER HO r. = j8Z . 00 f00 G.F. 3G'�QETENT/ONPIPE C� S = 0.00� " s� gti1 B --- W g yz 4 Z' B SECTION A -A DETENTION POND 3/ 9/94 Bennett PS & E page 1 STAGE STORAGE TABLE CUSTOM STORAGE ID No. PNP Description: POND AND PIPE STAGE <---- STORAGE ---- > STAGE <---- STORAGE ---- > STAGE (ft)---cf-----Ac-Ft- (ft)---cf-----Ac-Ft- (ft) 384.00 0.0000 0.0000 384.60 401.20 0.0092 385.20 384.10 64.200 0.0015 384.70 481.40 0.0112 385.30 384.20 128.40 0.0029 384.80 561.60 0.0129 385.40 384.30 192.60 0.0044 384.90 641.80 0.0147 385.50 384.40 256.80 0.0059 385.00 722.00 0.0166 385.60 384.50 321.00 0.0074 385.10 818.20 0.0188 395.70 :---- STORAGE ---- > STAGE <---- STORAGE ---- > --cf-----Ac-Ft- (ft)--- cf--- --Ac-Ft- 914.40 0.0210 385.80 1547 0.0355 1011 0.0232 385.90 1661 0.0381 1107 0.0254 386.00 1776 0.0408 1203 0.0276 1318 0.0302 1432 0.0329 3/ 9/94 Bennett PS & E page 2 STAGE DISCHARGE TABLE MULTIPLE ORIFICE ID No. OUT Description: OUTLET STRUCTURE Outlet Elev: 384.00 Elev: 382.00 ft Orifice Diameter: 3.6680 in. Elev: 385.00 ft Orifice 2 Diameter: 3.4219 in. Elev: 385.60 ft Orifice 3 Diameter: 12.0000 in. STAGS <--DISCHARGE --- > STAGE <--DISCHARGE --- > STAGE <--DISCHARGE --- > STAGE <--DISCHARGE --- > (ft) cfe-- (ft) --- cfe-- ------- (ft) --- cfe--------- (ft) --- cfs--------- `.........x..s 384.00 f'. 0.0000 38480 R' 0.3266 385.60 0.7081 386.40 4.4368 384.10 0.1155 384.90 0.3464 385.70 1.9776 386.50 4.6736 384.20 0.1633 385.00 0.3651 385.80 2.5216 386.60 4.8984 384.30 0.2000 385.10 0.4834 385.90 2.9451 386.70 5.1127 384.40 0.2309 395.20 0.5421 386.00 3.3055 306.80 5.3179 384.50 0.2582 385.30 0.5903 386.10 3.6255 386.90 5.5152 384.60 0.2828 385.40 0.6330 386.20 3.9165 397.00 5.7054 384.70 0.3055 385.50 0.6718 386.30 4.1954 3/ 9/94 Bennett PS & E page 3 LEVEL POOL TABLE SUMMARY NATCH INFLOW -STO- -DIS- <-PEAR-> STORAGE <-------- DESCRIPTION --------- > (cfs) (cfs) --id- --id- <-STAGE> id VOL (of) 2YR --'�i- 0.35 0.41 PNP OUT 384.91 18 649.20 10YR 0.67 0.75 PNP OUT 385.48 19 1186.05 100YR ........................ 1.36 1.36 PNP OUT 385.65 20 1373.05 w u c M r r a Tine in Hours Hyd No.: 12 2 D + 20 f> Rate: 0.41 cfs Time: 8.00 hr Vol 0.39 Ac-ft Int: 10.00 min Hyd No.: 13 2 E +- 2 c5 _ Rate: 0.35 cfs Time: 9.00 hr Vol : 0.36 Ac-ft Int: 10.00 min Hyd No.: 18 Zyr,5+o'vn sys4-ev, Rate: 0.35 cfs Time: 10.17 hr Vol : 0.39 Ac-ft Int: 10.00 min 11 Tine in Hours Hyd No.: 14 10D A- I os Rate: 0.75 cfs Time: 8.00 hr Vol : 0.66 Ac-ft Int: 10.00 min Hyd No.: 15 E of -i- lc os Rate: 0.67 cfs Time: 9.00 hr Vol 0.62 Ac-ft Int: 10.00 min Hyd No.: 19 o yea ^ stasrv,-, v-vwAee- ��L�tAh S+eh Rate- 0.66 cfs Time: 9.50 hr Vol : 0.66 Ac-ft Int: 10.00 min Hyd Hyd Hyd Tine in Hours No.: 16 I DOD A- 100 o S Rate: 1.36 cfs Vol : 1.14 Ac-ft No.: 17 100E + loo o- Rate: 1.25 cfs Vol : 1.09 Ac-ft No. : 2 0 100 y ec.- s t n Rate: 1.36 cfs Vol : 1.13 Ac-ft Time: 8.00 hr Int: 10.00 min Time: 8.67 hr Int: 10.00 min Time: 8.17 hr Int: 10.00 min V. CONVEYANCE SYSTEM ANALYSIS AND DESIGN On -site pipes are 12", and are sufficient to convey the 25 year, 24 hour storm. See nomographs. Biofiltration swale sized to treat 2 year, 24 hour storm with 1 foot of freeboard, and convey 100 year; 24 hour storm without overtopping. See calculations. Existing storm system is 36" diameter, assume sufficient capacity. KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL FIGURE 4.3.4A NOMOGRAPH FOR SIZING CIRCULAR DRAINS FLOWING FULL 1000 900 800 .0001 2.0 700 600 .0002� 500 .0003 Minimum Allowable 400 .0004 .0001 Velocity .0005 (Ftowi ng .0006-� = Full) 3'0 300 v .0008 � .0002 120 c14 .001- 108 0 _�-.0003 200 96 II .0004 90 c .002Z-.0005 4.0 84 0006 78 p .003 — 0008 -72 w 004 001 CL 66 005 cwn 5.0 60 00100 Z 90 54 � O 80 48 .0r6.0 03 70 w 4' 60 42 7.0 LL Z 36 50 . Z 33 03 8.0 30 .008 40 w .010 O LL w a- 27 .05 Z 9.0 Q 30 LL 24 .06 8 .020 H 10.0 O 21 .10 U rU w A3❑ O 20 w 18 .040 w f Q 15 .060 12 .100 10 . 10 9 8 SAMPLE USE 7 8 24- dia. CMP @ 2% slope yields 20.0 6 17cfs @ 5.2 FPS velocity (n = 0.024) 5 L 6 Values per Manning's Equation 4 Q= ( 1.49) AR'/aS%s n 30.0 This table can be converted to other "n" values by applying 2 formula: 40.0 01 _ n1 02 n2 I ►'1 .01 2 (ID1-P) 4.3A-18 _''S 0, QZ,-> 1/90 •�IiNYl b.L4:W J3 WtilW ;MIN s l � 1GZ�t�(ldi; r' '3 i 9�i-3S�3 3 3 9 mac. 131 ooh Soc, Ves�y peg �o� ma►�� s 4e c�s 1 44& ( O.Z5� t p, 02) 1 o 0.$3 (0.2S) y � olL V Q / -� 0.39 �p p r n = 0. V+ O OG era.��arGit ce vg, _ 4,s 019 actuoJ VK = 1,186 x ,��6 &0 0.s h 319+ 56-< - »>c» Neey N.cII.c/JN Q tytll�l W W ��ug33 �w'wwww N WyWyY y W�WWW — QC _oeeee� SC L o,D+ W i Ufl-- 2 o/, I2, 0. gr —2- qz/, vP r � +2�� C�2�►) sec �o.60SD.s Legg . o� b i o sw a-b- _..!. Q,.-b._le�_. 9 2-��Z I ncr�cc�se� D. 92 = b( 0,25) t- 3 (D, 251Z lo= 2.-,q21 use, b= Z .S 1 1 �L I �S� STORMWATER MANAGEMENT MANUAL FOR THE PUGET SOUND BASIN SC-3. Estimate the degree of retardance from Table III-6.2. When uncertain, be conservative by selecting a relatively low degree. SC-4. Establish the maximum permissible velocity for erosion prevention (Vmex) from Table III-6.3. Table III-6.3 Guide for Selecting Maximum Permissible Swale Velocities for Stability Check (a) Cover Slope Maximum Velocity ($) (ft/sec) Kentucky Bluegrass 0 - 5 5 �- Tall Fescue Kentucky Bluegrass 5 - 10 4 Tall Fescue Western Wheat rasa Grass -legume Mixture 0 - 5 4 5 - 10 3 Red Fescue Redtop 0 - 5 2.5 5 - 10 Not Recommended (a) Adapted from references 3, 4, and 6. SC-5. Select a trial Manning's n. The minimum value for poor vegetation cover and low height (possibly, knocked from the vertical by high flow) is 0.033. A good initial choice under these conditions is 0.04. SC-6. Refer to Figure III-6.6 to obtain a first approximation for VR. SC-7. Compute hydraulic radius, using the Vmax from step SC-4: R = VR Vmac (6-13) SC-8. Use Manning's equation to solve for the actual VR: VR = 1.486 R1.667 g0.5 ( 6-14 ) n SC-9. Compare the actual VR from step SC-8 and first approximation from sten SC-6. If they do not agree within 5 percent, repeat steps SC-5 to SC-? until acceptable agreement is reached. SC-10. Compute the actual V for the final design conditions: V = VR (6-15) R Check to be sure V < Vin" from step-SC-4. SC-11. Compute the required A for stability: A = 0 (6-16) V III-6-18 FEBRUARY, 1992 STORMWATER MANAGEMENT MANUAL FOR THE PUGET SOUND BASIN 06 05 04 03 02 ti Figure III-6.6 The Relationship of Manning's n with VR for Various Degrees of Flow Retardance (from Livingston et al., 1984, after U.S. Soil Conservation Service, 1954) INN 10MMI I .2 .3 .4 .5 .6 .8 1 2 3 4 5 6 8 10 20 VR, PRODUCT OF VELOCITY AND HYDRAULIC RADIUS (Ieet2/second) SC-12. Compare the A computed in step SC-11 of the stability analysis with the A from the biofiltration capacity analysis (step D-5 or 0-14). If less area is required for stability than is provided for capacity, the capacity design is acceptable. If not, use A from step SC-11 of the stability analysis and recalculate channel dimensions (refer to Figure III-6.5 or Equation 6-2). Use y from Step 0-1. SC-13. Calculate the depth of flow at the stability check design flow rate condition for the final dimensions (refer to Figure III-6.5 or Equation 6-2). (For trapezoids use y = (T-b)/2Z) SC-14. Compare the depth from step SC-13 to the depth used in the biofiltration capacity design (Step D-1). Use the larger of the two and add 1 foot freeboard to obtain the total depth (yi) of the Swale. Skip this step in filter strip design. (Editor's Note: If space is limited, calculate the depth needed for the 100-year, 24-hour storm then add this depth again for freeboard, up to a maximum freeboard of ; foot.) ' III-6-19 FEBRUARY, 1 10' I' F,IpEE,B0,4,4O r O.25' 2.5' SECTION B - B r BIOFILTRATION_ SWALE Scale: P - 2' VI. SPECIAL REPORTS AND STUDIES N/A VII. BASIN AND COMMUNITY PLANNING AREAS N/A VIII. OTHER PERMITS N/A IX. EROSION/SEDIMENTATION CONTROL DESIGN Erosion and Sedimentation Control devices: Permanent detention system shall be used for sediment trap, and will be cleaned thoroughly when construction is completed. Other measures t❑ be utilized are silt fence, temporary construction entrance, revegetation of disturbed areas as soon as is practical, and construction sequence indicating timing of construction and placement of temporary erosion and sedimentation control measures. X. BOND QUANTITIES WORKSHEET, RETENTION/DETENTION FACILITY SUMMARY SHEET AND SKETCH, AND DECLARATION OF COVENANT King County Building and Land Development Division COMMERCIAL/MULTIFAMILY GROUP BOND QUANTITIES WORRSHEET Page 1 of 2 Date: 3114194 I BALD Project No.: 1 I Project Name: Ron Butz Office Buildin Site Address: 35406 21st Ave. SW Fill in those items which pertain to this project and return to the Commercial/Multifamily Group - Site Development Review Unit. A.C.Pavement . . . . . . . . . . Cement Conc. Curb & Gutter . . . Extruded Asphalt Curb Concrete Sidewalk . . . . . . . 6" pipe . . . . . . . . . . . 8" pipe . . . . . . . . . . . . 12" pipe . . . . . . . . . . . . 15" pipe . . . . . . . . . . . . 18" pipe . . . . . . . . . . . . 24" pipe . . . . . . . . . . . . 361, pipe . . . . . . . . . . . 4811 pipe . . . . . . . . 601, pipe . . . . . . . . . . . . 72" pipe . . . . . . . . . . . . Curb Inlet . . . . . . . . . . . CS TYPE I & I-L . . . . . . . . CS TYPE II - 48" . . . . . . . . CB TYPE II - 5411 . . . . . . . . CS TYPE II - 72" . . . . . . . . CS TYPE II - 9611 . . . . . . . . Restrictor/Separator 12" . . . . Restrictor/Separator 15" . . . . Restrictor/Separator 181, . . . . Restrictor/Separator 24" . . . . Fencing (around pond) . . . . . R i prap . . . . . . . . . . . . Rockery, Gabion & ecology wall . Concrete Retaining Wall Excavation for Pond Infiltration Trench . . . . . . Flow Spreader Trench Drain . . . . . . . . . . Trash Rack . . . . . . . . . . . Detention Pipe Riser . . . . . _ PUBLIC ROADWAY IMPROVEMENTS I PRIVATE ON -SITE IMPROVEMENTS I Unit Price Unit 8.00 SY 9.00 LF 2.50 LF 9.00 LF 7.50 LF 10.00 LF 15.00 LF 16.00 LF 20.00 LF 26.00 LF 30.00 LF 50.00 LF 65.00 LF 80.00 LF 500.00 EA. 750.00 EA. 1400.00 EA. 2100.00 EA. 3400.00 EA. 4000.00 EA. 450.00 EA. 500.00 EA.. � 600.00 EA. 750.00 EA. 10.00 LF 30.00 CY 1 7.00 SF i 8.00 SF i 5.00 CY I 15.00 LF 15.00 LF 15.00 LF 100.00 EA. 400.00 EA. Quantity 125 LF I SUBTOTAL i Price i Quantity P Price I S i 1015 SY s8120.001 steal S 1 S I S S I S I s S I 3 S I $ I S I 100 LE $3000. 01 $ I s I S I s I S I s I $ I S I S I 2 EA s 1500.00 s ! 3 EA s5300.001 S � S s j 1 EA s 450.001 $ I s I S I $ S S I S I �' s I 220 SF s1540.00 S i $ $ I 70 CY s 350.001 s I $ 1 S $ $ $ I s 1 s i s I s S I S s I s j 1 s1,125.00 SUBTOTAL ! 0 s 24,140.60 ! 1/90 BOND QUANTITIES WORRS$EET King County Building and Land Development Division Commercial/Multifamily Group EROSION/SEDIMENTATION CONTROL FACILITIES Unit Price Unit Quantity Price Silt Fence ......... . . S 3.00 LF 245 LF s 735 00 Seeding/Mulch . . . . . . . . . 3000.00 ACRE A S300.00 Temporary Pond . . . . . . . . . 5.00 CY S j Standpipe . . . . . . . . . . . 200.00 EA. S CB Interim Protection . . . 25.00 EA. �� S Quarry SpaLL/Rip-rap . . . . . . 30.00 CY S Rock Construction Entrance . . . 300.00 EA.� S_UUU_.M f Pipe ( inch dia.) . . . . . . LF S $ j { S i I f SUBTOTAL : I s17385,00 I page 2 of 2 Signature: Telephone No.. (206) 838-3474 1 11, Name: Bennett P S & E The following information will be completed by the King County Site Development Review Unit. PUBLIC ROADWAY IMPROVEMENTS: $ PRIVATE ON -SITE IMPROVEMENTS: S EROSION/SEDIMENTATION CONTROL : S SUBTOTAL : S 20% CONTINGENCY : $ TOTAL BOND AMOUNT S %IGHT-OF-WAY BOND S #8:BONDSHEE.WPF 11/25/1989 1/90 XI. MAINTENANCE MANUAL N/A SUMMARY SHEET ADDRESS PROJECT NAME: Ftt.i-2- A-,,�e CP Cross References/file Ps: r� -r Parcel Number(s)- Section, Township & Range: Project Description: - � t ,0 r--6 fn4 m Gf,,u4 \ Owner: JOY Applicant: v T- RLES\sTtR SSHT CITY OF FEDERALWAY 33530 First Way South MECHANICAL PERMIT Federal Way, WA 98003 Building Inspection Requests 661-4140 661-4000 ADDRESS:35406 21ST AVE SW NO.: 252103-9032 PROJECT DESCRIPTION:COHN HVAC - INSTALL 1-3 1/2 TON HVAC UNIT OWNER - - RON BUTZ 35406 21ST AVE SN FEDERAL WAY WA 98023 661-2362 FU L TYPES.:GAS ELE fANS........--_ 5 PIPING.: 150 ft HOOD..........: 0 N<100K..: 0 DUCT WK.....; GAS HWT.... : 0 WDOD STOVES...: CONV BURNER: 0 FURR>100K.....: t7 BBQ........ . 0 GAS DRYER..: 0 AIR HANDLING UNITS RANGE......: 0 t=10,000 CFM: 1 GAS LOGS...: 0 > 10,000 CFN: 0 CONTRACTOR - SEA AIRE SHEET METAL INC 820 INDUSTRY DR TUKWILA WA 98188 575-8360 SEAAISNOB189 BOILERS/COMPRESSORS 0-3 HP....... 0 3-15 HP...... 0 15-30 HP....: 0 30-50 HP....: 0 5+ HP........ 0 FUEL TANKS --------- ABOVEGROUND: 0 UNDERGROUND.: 0 PERMIT NO: BLD94-0384 ISSUED: 05/19/94 BY: FC EXPIRES: 11/15/94 LENDER -_---------__ . _- FEES: -.PLAIT- MCK DEPOSIT.* _AEC PRMT ISSUANCE... NEC APPLIANCE FEES.* TOTAL FEES $ 30.00 $ 20.00 $ 24.50 $ 74.50 Does the water supply syste- contain a Pressure Reduction Device or Check valve? () Yes () No (If 'Yes' then water expansion tank is required on Hat Water inspection Record Water Line OK Mechanical Inspection Notes: GAS PIPING OK Date By PERMITS EXPIRE 180 DAYS AFTER"fSSUARCE IF NO ORK IS SMIRE . ESIDEXT ,,,_ AND GRADING PERMITS EXPIRE ONE YEAR AFTER DATE OF ISSUANCE. I CERTIFY THAT THE INF RTION FURNISED E T�tUE AND CO TO THE BEST OF MY KNOWLEDGE AND THE APPLICABLE CITY OF FEDERAL WAY REQUIREMENTS WILL BE MET. UWNI OR AGENT DATE -- _ y _-- _ _-- _____ ____-----___.-...--- �. I FILE COPY BCE "OR DEVELOPMEN .'PERMIT MAY 111994 PLEASE PI7INT _ APPI./CAT/ON #� 511'E 1. GJ1TX[)N Gi.". f lFEO� Wrikfrevv 35 LIGCo Z� 5j _ Tenant Let k� Assessor's Tax A ZS'zfo3- y03 Bulldlnp ,Owner Name Phone City State Zip wo Appucxk: : Name (F,M,Li - -• - — _S�A - Amec Sf) E-ETN%i - TIC Address - c--•� ity w. - Day Phone 7 S - L3 3Cu 0 XN0�C714`T'R� C Company Nema Address City Contact Person Contractor's A (card must be presentad); State zip Other Phone Fax state Phone Expiration Date Zip Fax Verified �~ 11 Yen ❑ No Name r Addrasa City �- -- State Zip CcWacl rilere6n Ph6ne _ Fax -- ,., c • vAia:. .. Cxltilno use Proposed Use Permit Includes: C7- Building _ ❑ Pftrmtiny —� Meehenics) ❑ Other Typa of Work; r7l Residential ❑ New 0 Remodel 0 Number of Units U Deck Commerclal q Addition ❑ Garage _ ❑ Shed O Other Enter t ct Floor _ Area Basement _ sq ft 2nd Floor eq ft _ 3rd Floor �—`- aq ft Existin Floor ArAa 6 — q� aq (t _ Q _ q ft Decks _ eq ft Sewer Approval Garage - Iq ft Propetad Total Man Fq ft Water Availability y _ y T Prajact,Valuetip►t S 1'fg4se Col- to R yonma Wdy C00492 IRev 2r931 Name Address City Contact Stets- —~- Phone zip .�...... .__. Fax } Contractor Nerne y Addrena iN-1) LAST-r2y City State ZIP Tu t« Canteot Phone V F±, Tom► a_ k—� _,�r 'Ty ft..r_�__._ `7�� 3Cn cl �5_ 7 License N Expiration Oete Verified 5E7AAZ,SiI- c;e113c� / - 20 -- �S ce ❑ No Convector Name Address, City .. .... _ ._— Contact License # P3_LlNMING FLYTURt C0th4 Water Closets Bathtubs Sltowars Lavatories s Sinks Dish Washers _ Electric Water Heaters Washlnp Machine State Phone -r�- Expiration hate Urinate Drinking Fountains Sumps hre,.,. Zip . Fax Verifiedy ' ❑ Yee O No Lawn 5prinklem Other �Rti4�1.L'Ll��a_AiJ 1•f1�L 1 . to V i.�iv � .._�__ - - - --- ...-.--�.�n r .��-..^---- w.r_..n....._........r_ 'Gas Dryer j3 II rr Air Handling i - 10,000 CrfA 15-30 Tone »..� Fuel Type! (elecTtric/other) Cp�+4s ~ Length of Gas Piping /Jr� J='77, Range �v- ��4 Air HencNing > e 10,000 CF I- 30. 50 Tons Furn c 1_OOK BTUs ply aGKt 07 0 Furn > 100 BTUs Gee Log Fans I� �Cj Unit Heater 60-t Tone Fuel Tanks Miscellaneous Gas Hwt A Canv Burner p1 Flood - — �Id Boilers ".bvve Ground Underafound Duct Work ,�[+j _ .! 0•1 Tc;,s BBQ'e r. Wood Stoves �} 3 1 one '/� Total lJnit Count DISCLAIMER: I certify under penally of per)ury that the Information furnished by me Is true end correct to the befit of my knowledge and further that I am euthorlead by the owner of the above premises to perfortn the work for which permit appfloation is made, I further Agree to says hsrmleas the City of Federal Way Am to any Claim llncluding e601, expense(, and attorneys' fees Incurred in Invaetlgatlon and defense of such claiml, which may be made by any person, including the undersigned, and filed against the City of Federal Way, but only where much claim prises out of thz refl__.^.aa of the City, InOudlna Its officers and amploy.ee, upon the oc•-• r f th k r -,led to the C' - oars of this sopHoatlon, ' [� Owner/Agent: ��/� /I�'-- ._..r s ^• i � '' 9� , 7/13/95 City of Federal Way 33530-1st Way S. Federal Way, WA 98003 Attn: Richard Mamma We have stopped further progress for a building permit on our property at 35406-21 st Ave SW. Please refund all building permits & planning fees. Thank Ron Butz 1911 SW Campus Dr. #353 Federal Way, WA 98023 952-6151 r 57 , 10"" j�c'_rliki Ii��S /P '-�,,+r s Ova t��' T roy a4v lICC6 akS r� Ct(C) 4xr �Acp['VAI C,, I,Rs Lao Yevc t coO euL( a RECE��.�� City of Federal Way w APPLICATION FOR BUILDING PERMIT APR 1% PLEASE PRINT O ILDINC DPT APPLICATICP SITE LOCH N.:h' r:: Addre Tenant (if. nQwni I c I I Lot # Building ner Name City 1 Nature of Work APPLICANT Name (F,M,L) Address City Contact Person_ l �� BUILDING CONTRACTOR Day Phone qi3l?- 9 7 Address ;�r, Zip Assessor frax # 35 31. Phone %4 Mery Zip Phone Fax &I-/— z.S/ -7 9 3 9 9 Company Name rr �I Address City ti• Contact Person� Contractor's # (card must be presented) �J•�` 5'� 2--VIAck DJ Al 0 9 F ARCHITECT Name Address City State Zip Contact Person Phone I Fax EGAL DESCRIPTION sTk Z 7- OZ 49' f If go 3 Z 1Z5` f¢ % 5 r rU 4,,Al Xesr 6)- Please Complete Reverse Side CD0492 {F S1 RUCTU E Permit includes: �-fisting Use ^L Building A1,0� Plumbing -"oposed Use Qr4 L] Mechanical ❑ Other Type of Work: ❑ Residential Commercial 32K New ❑ Addition ❑ Remodel ❑ Garage ❑ Number of Units _ ❑ ❑ Shed ❑ Deck Other Enter 1 st Floor I970 sq ft Area Basement q ft 2nd Floor A— sq ft 3rd Floor .,V 5q sq ft Decks 1^64 sq ft Garage sq ft Existing Floor Area Propo d Total Area sq ft sq ft Water fivailabilit � Sewe Availability On -Site tic System vailability ❑ Project Valuation Zonirlq Lot Six 12 .� �j *ung Bldg Valuation I $ LENDE hJama Address i, City $dlate Zip MECHANICAL CONTRACTOR Contractor Name :, ` Address City State Zip Contact Phone Fax License # }. Expiration Date Verified ❑ Yes ❑ No PLUMING CONTRACTOR Contractor Name 4.1 Address City State Zip Contact v Phone Fax License # Expiration Date Verified ❑ Yes ❑ No PLUMBING FIXTURE COUNT Water Closets Zile-&- Sinks Urinals ik, Lawn Sprinklers AJ A Bathtubs /v 4 Dish Washers eLlIA- Drinking Fountains 18A►,. Other Showers AI A Electric Water Heaters N. A Sumps A)lM t? Lavatories 2 PA Washing Machine OV 4 Drains A&Y, 'e— Total Fixture Count MECHANICAL U. N` r COUNT Fuel Type (electric/other) Gas Dryer Air Handling < = 10,000 CFM 1 15-30 Tons Length of Gas Piping Range Air Handling > = 10,000 CFM 30-50 Tons Furn <1OOK BTUs Gas Log Unit Heater 50+ Tons Furn > 100 BTUs Fans Miscellaneous Fuel Tanks Gas Hwt Hood Boilers Above Ground Conv Burner Duct Work 0-3 Tons Underground BBQ's Wood Stoves 3-15 Tons Total Unit Count DISCLAIMER: I certify under penalty of perjury that the information furnished by me is true and correct to the best of my knowledge and further that I am authorized by the owner of the above premises to perform the work for which permit application is made. I further agree to save harmless the City of Federal Way as to any claim (including costs, expenses, and attorneys' fees incurred in investigation and defense of such claim), which may be made by any person, including the undersigned, and filed againstthe City of Federal Way, but only where such claim arises out of the reliance of the City, including its officers and employees, upon the accuracy of the information supplied to the City as a part of this application. Owner/Agent: Ld,i / Dntn; 'IVriz 4, JN(,oe oex>- a to &1-1 4J,� ]Bennett PS&E INC. Surveyors and Engineers OCT 3 1 Q IE7T�O� P.O. Box 1031 ° u`1 uW U,�LLJ Puyallu WA 98371 720 East Main P. Puyallup 845-8833 Seattle 838-3474 FAX (206) 841-1734 kATeTEN TION� RE: WE ARE SENDING -YOU Attached ❑ Under separate cover via—. ❑ Shop drawings Prints ❑ Plans ❑ Samples ❑ Copy of letter ❑ Change order p COPIES DATE NO. mg — l � M"MEwwm Is l IP 1,41 �- THESE ARE TRANSMITTED as checked below: 4 For approval ❑ Approved as submitted For your use ❑ Approved as noted ❑ As requested ❑ Returned for corrections ❑ For review and comment ❑ DESCRIPTION J09 N - the following items: ❑ Specifications yr r r LV# rl::11 ❑ Resubmit copies for approval ❑ Submit copies for distribution ❑ Return corrected prints NED AFTER LOAN TO US COPY TO 7 SIGNED:�� -7j rL� I:3�nn�tt Sell, E SURVEYORS AND ENGINEERS P.O. BOX 1031 • PUYALLUP, WA 98371-0255 PUY: (206) 845-8833 SEA: (206) 838-3474 FAX: (206) 841-1734 October 25, 1994 Skip Tullock City of Federal Way Department of Public Works 33530 1st Way South Federal Way, Washington 98003 Re: Ron Butz Office Building Site Dear Mr. Tullock, Enclosed please find the revised plans and Technical Information Report for the Ron Butz Office Building site. You will note that there are no changes with regard to development of the east half of the site. As we discussed in our meeting several weeks ago, the east half of the site is not being disturbed at this time and is therefore not included in any calculations. If, in the future, this portion of the site is developed, detention will be designed as needed and located on the rear portion of the property. The biofiltration swale can be enlarged as necessary as well. Also in our last meeting, you said that the off -site runoff contributing to the site was insignificant and need not be considered. It will not cross the site due to parking area perimeter curbing, but will merely enter the landscape area and serve a beneficial purpose in decreasing the need for irrigation. Are there any new concerns regarding the off -site runoff that we may not be aware of? Lastly, we still feel that replacing the cross -pipe in 21st Avenue SW is the best solution for site storm drainage. The contractor, Mr. Dick Tydings at Interwest feels there will be no problem with boring in the new pipe without making a road cut. If you have any major concerns with these plans, please call our office to set up a meeting so that we can discuss and solve any problems before going through another complete review process. Sincerely, Robert A. Bennett, PLS 7t ae,' e d2t�__ Stacie E. Carter, EIT :• L. SURVEYORS AND ENGINEERS P.O. BOX 1031 • PUYALLUP, WA 98371-0255 PUY: (206) 845-8833 SEA: (206) 838-3474 FAX: (206) 841-1734 DRAINAGE ANALYSIS FOR RON BUTZ NEW OFFICE BUILDING SITE LOCATED IN. THE NE 1/4 OF SEC 25, TWN 21 N, RGE 3 E, WM BY: SEC CHECKED: CRB DATE: 8/22/94 JOB #: 94-3543 6"4 ols CORE REQUIREMENTS #1 Site is in a developed area. Concentrated flow will be discharged to the existing storm system in 21st Ave. SW. #2 Off -site analysis - see "Downstream Analysis," no problems noted in existing storm drainage system. Not in critical drainage area, nor floodplain, no sensitive areas, nor wetlands. Soil type AgB, Alderwood, in Hydrologic Soils Group "C". #3 The proposed project site post -developed peak runoff rate for the 100 year, 24 hour duration design storm event is less than 0.5 cfs more than the peak runoff rate for existing site conditions, therefore, no detention is necessary. Biofiltration is provided. #4 Pipes sized for 25 year, 24 hour storm with 0.5 feet minimum freeboard in all catchbasins. #5 Erosion and Sedimentation Control devices: A temporary sediment trap and interceptor swale will collect runoff from the site during construction and convey it to the existing storm system in 21st Ave. SW. Other measures to be utilized are silt fence, temporary construction entrance, revegetation of disturbed areas as soon as is practical, and construction sequence indicating timing of construction and placement of temporary erosion and sedimentation control measures. #6 Maintenance and Operation - site and facilities will be privately owned and maintained in accordance with Operation and Maintenance Manual. #7 Owner shall put up required bonds - see worksheet. SPECIAL REQUIREMENTS #1 Exempt - not in critical drainage area. #2 Exempt - no Master Drainage Plan. #3 Exempt - no Community Plan, or PUD, less than 500 acres cleared. #4 Exempt - no Basin or Community Plan. #5 Exempt - less than 1 acre (0.806 acres). #6 Exempt - less than 5 acres. #7 Exempt - no discharge to closed depression. M #8 Exempt - no use of lakes, wetlands, or closed depressions. #9 Exempt - site does not abut nor contain stream, lake, wetland, nor closed depression. #10 Exempt - site does not contain nor abut class 1 or 2 stream. #11 Exempt - no steep slopes or high berms. #12 Exempt - soils are mapped (AgB, Alderwood). TECHNICAL INFORMATION REPORT TABLE OF CONTENTS PAGES I. Project Overview....................................4 Figure 1 - TIR Worksheet ............................5-6 Figure 2 - Site Location ............................7-8 II. Preliminary Conditions Summary......................9 III. Off -Site Analysis................................10 Figure 3 - Hydrologic Soils Groups.................11 Figure 4 - SCS Curve Numbers.-......................12 Figure 5 - Off -Site Basin Map-: ............. **.....13 Figure 6 - Aerial Photo ............................14 Downstream Analysis................................15 Figure 7 - Downstream Map..........................16 IV. Retention/Detention Analysis and Design ............ 17 Figure 8"- On -Site Basin Map.......................18 Figure 9 - SCS Soils Map ...........................19 Hydrologic Analysis - Basins and Hydrographs....... 20-25 V. Conveyance Systems Analysis and Design.............26 Figure 10 - Nomograph ............................ .27 Biofiltration Swale Calculations .............. ..... 28-32 Biofiltration Swale Cross-Section..................33 VI. Special Reports and Studies ........................34 VII. Basin and Community Planning Areas.................35 VIII. Other Permits......................................36 IX. Erosion/Sedimentation Control Design...............37-38 X. Bond Quantities Worksheet, Retention/Detention Facility Summary Sheet and Sketch, and Declaration of Covenant............................39-42 XI. Maintenance and Operations Manual..................43-50 I. PROJECT OVERVIEW The 0.806 acre site is currently undeveloped, with a ground cover of deciduous and evergreen trees, and brush. Soils are Alderwood, AgB. Natural drainage is sheet and shallow concentrated flow from south to north across the site. There is an existing storm system in 21st Avenue SW which abuts the site on the west. This project proposes construction of approximately 14,140 square feet of impervious area, with an office building and paved parking area. The eastern half of the site will remain undisturbed, and will not be considered in drainage calculations as it will not contribute to the developed area. Stormwater from this site will be treated with an oil pollution control device and biofiltration swale and then directly discharged to the existing storm system in 21st Ave. SW. � ��T -�U' fA Q, �4 1 k,5 to 09h Ait --�D <5-1'T�. � U? lZ �- � �L N �o I J King County Building and Land Development Division TECHNICAL INFORMATION REPORT (TIR) WORKSHEET ProjectOwner Ron Butz Address1911 SW Cam us Dr. #353 FW Phone 206 952-6151 Project Engineer Charles R. Bennett, PE - Company Bennett PS&E Address Phone (206) 838-3474 PART 3 TYPE OF • Q Subdivision Q Short Subdivision Q Grading xQ Commercial = Other Drainage Basin Q River Q Stream Q Critical Stream Reach Q Depressions/Swales Q Lake Steep Slopes Q Lakeside/Erosion Hazard Aiderwooa Page 1 of 2 Project Name Ron Butz Office Buildin Location Township 21 N Range 3 E ' Section 2 Project Size 0.40 AC Upstream Drainage Basin Size 1.59 AC Q DOF/G HPA Q COE 404 Q DOE Dam Safety Q FEMA Floodpiain Q COE Wetlands Q Roodplain Q Wetlands Q Seeps/Springs Q High Groundwater Table Q Groundwater Recharge Q Other Erosion Potential Q f Shoreline Management i Q Rockery Q Structural Vaults Q Other Q HPA Erosive Velocities = Af4e4itinn=1Chaatc Attatrhed 1/90 Page 2 of 2 King County Building and Land Development Division TECHNICAL INFORMATION REPORT (TIR) WORKSHEET REFERENCE Ch. 4 - Downstream Analysis Additional Sheets Attatched LIMITATION/SITE CONSTRAINT None MINIMUM ESC REQUIREMENTS MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION FOLLOWING CONSTRUCTION Q Sedimentation Facilities Q Stabilize Exposed Surface Q Stabilized Construction Entrance ® Remove and Restore Temporary ESC Facilities Q Perimeter Runoff Control Clean and Remove All Silt and Debris Q Clearing and Grading Restrictions Q Ensure Operation of Permanent Facilities ® Cover Practices U Flag Limits of NGPES 0 Construction Sequence Q Other Q Other Q Grass Lined Channel ® Pipe System Q Tank Q Vault Q Q Infiltration Depression Method of Analysis SBUH Q Open Channel Q Dry Pond Wet Pond Q Energy Dissapator Wetland Q Stream Q Q 0 Flow Dispersal Waiver Regional Detention Compensabon/Mitigafion of Eliminated Site Storage Brie s tionofSystem0 bon. Water collected pofl�u 'on control device;—Lo 100 tr 51orliEraulon in paved area, throup-h ❑iI swa- e, outlet to Facility Related Site Limitations Q Additional Sheets Attatched Reference Facility Limitation Q Cast in Place Vault Q Other Q Retaining Wall Rockery > 4' High Structural on Steep Slope I or a civil engineer under my supervision have visited the site. Actual site conditions as observed were incorporated into this worksheet and the attatchments. To the best of my knowledge the information provided here is accurate. Q Drainage Easement Q Access Easement Q Native Growth Protection Easement Q Tract Q Other re " X- P. "— wil M M 1190 II. PRELIMINARY CONDITIONS SUMMARY N/A lC) III. OFF -SITE ANALYSIS Upstream tributary area is 1.59 acres, type "C" soils. The land use for 0.55 acres of this tributary area is housing with a density of 6.6 DU/GA, and a CN of 92. The remaining 1.04 acres of tributary area is forested with a CN of 81. The average slope of this subbasin is about 2.7%. The tributary area is cut off by SW 356th Street. KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL (2) CN values can be area weighted when they apply to pervious areas of similar CN's (within 20 CN points). However, high CN areas should not be combined with low CN areas (unless the low CN areas are less than 15% of the subbasin). In this case, separate hydrographs should be generated and summed to form one hydrograph. FIGURE 3.5.2A HYDROLOGIC SOIL GROUP OF THE SOILS IN KING COUNTY SOIL GROUP HYDROLOGIC HYDROLOGIC GROUP SOIL GROUP GROUP* C Orcas Peat Oridia D D Alderwocd Arents, Aiderwood Materiai B Ovall C Arents, Everett Material C Pilchuck C Beausite D Puget D Bellingham D Puyallup B Belling D Ragnar B Buckley Coastal Beaches Variable Renton D Variable Earlmont Silt Loam D Riverwash C Edgewick C A /B Salal 'Sammamish D Everett A Seattle D Indianola C Shacar D Kitsap C Si Silt C Klaus Mixed Alluvial Land Variable Snohomish D C Neilton A Sultan Newberg B C Tukwila Urban Variable Nooksack Normal Sandy Loam D Woodinville D HYDROLOGIC SOIL GROUP CLASSIFICATIONS A. (Low runoff potential). Soils having high infiltration rates, even when thoroughly wetted, and consisting chiefly of deep, well -to -excessively drained sands or gravels. These soils have a high rate of water transmission. B. (Moderately low runoff potential). Soils having moderate infiltration rates when thoroughly wetted, and consisting chiefly of moderately fine to moderately coarse textures. These soils have a moderate rate of water transmission. C. (Moderately high runoff potentfai). Soils having slow infiltration rates when thoroughly wetted, and consisting chiefly of soils with a layer that impedes downward movement of water, or soils with moderately fine to fine textures. These soils have a slow rate of water transmission. D. (High runoff potential). Soils having very slaw infiltration rates when thoroughly wetted and consisting chiefly of clay soils with a high swelling potential, soils with a permanent high water table, soils with a hardpan or clay layer at or near the surface, and shallow soils over nearly impervious material. These soils have a very slow rate of water transmission. From SCS, TR-55, Second Edition, June 1986, Exhibit A-1. Revisions made from SCS, Soil Interpretation Record, Form #5, September 1988. V 3.5.2 _-2 11 /92 J �7 � ut- --e - 4- KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TABLE 3.5.2B SCS WESTERN WASHINGTON RUNOFF CURVE NUMBERS SCS WESTERN WASHINGTON RUNOFF CURVE NUMBERS (Published by SCS in 1982) Runoff curve numbers for selected agricultural, suburban and urban land use for Type 1A rainfall distribution, 24-hour storm duration. CURVE NUMBERS BY HYDROLOGIC SOIL GROUP LAND USE DESCRIPTION A B C D Cultivated land(1): winter condition 86 91 94 95 Mountain open areas: low growing brush and grasslands 74 82 89 92 Meadow or pasture: 65 7B 85 89 Wood or forest land: undisturbed or older second growth 42 64 76 81 Wood or forest land: young second growth or brush 55 72 81 86 Orchard: with cover crop et 88 94 ►Open spaces, lawns, parks, golf courses, cemeteries, landscaping. good condition: grass cover on 75% or more of the area 68. 80 C86 90 fair condition: grass cover on 50% to 75% of the area 77 85 90 92 Gravel roads and parking lots 76 85 89 91 Dirt roads and parking lots 72 82 87 89 Impervious surfaces, pavement, roofs, etc. 98 98 98 98 Open water bodies: lakes, wetlands, ponds, etc. 100 100 100 100 Single Family Residential (2) Dwelling Unit/Gross Acre % Impervious (3) 1.0 DU/GA 15 Separate curve number 1.5 DU/GA 20 shall be selected 2.0 DU/GA 25 for pervious and 2.5 DU/GA 30 impervious portion 3.0 DU/GA 34 of the site or basin 3.5 DU/GA 38 4.0 DU/GA 42 4.5 DU/GA 46 5.0 DU/GA 48 5.5 DU/GA 50 6-0 DU GA 52 6.5 ❑U /GA 54 7.0 DU/GA 56 Planned unit developments, % impervious condominiums, apartments, must be computed commercial business and industrial areas. lt] :-,or a more aetauea aescripuon of agricultural land use curve numbers refer to National Engineering Handbook, Section 4, Hydrology, Chapter 9, August 1972. (2) Assumes roof and driveway runoff is directed into street/storm system. (3) The remaining pervious areas (lawn) are considered to be in good condition for these curve numbers. 3.5.2-3 11/92 386.2 - �t. 3H9.9 x3g0.0 7x x3$5.2 39 x 3g3 a 39�.1 3 A x x a 3a5.7 x � � � 3as.1 X � � Q4• 9 x o / I r 3H7.0 3g3 3gX7 7 402X X P��,x 3g 'S 38H% ` 6 r� �� ` 390.H X 403 X 400.6 395.5 \ I 3a7.2 6 9i'�,r X 39 li 339.9 X X 392.5 x N 406.11 1 / x 3H6.7 385.5 3Hfi.1 X 3 6 I \ 400.4 47.T � 395.9 � � X x X 1, 390.7 X X X �( J 1. 40;�.4 I S L 392•t 6 X l X 399.1 39A.- 405.9 r�; X �y5. `l X 400.9 95.2 x x 15 389.3 395.9 401.3� X3g7.4 x 40 406.4 404.8 X HH.6 398.5 t.7 X 396.9 403: x 390.3l X390.1 39t 4 402.2X X 397 7 X 393.3 39t.9 � 1 402,3 X , X 8 1.9 401.3 X a 9 L1sv 390.2 x 99.. 402. X x 403.4 + 1 $_ X X X 401 x .2 397.9 40t.9 ;Otis �X -598 X X x / 391.1 I r 395.7 401.5 403 2 x 1 /X A405.1 r X 1.0 X398.3 401.5 X403.6 96.8 X 5 96.4 39 x / 4 X 3.7 40..6 3 .2 7. 40t. X 40 X 90.6 4Z X 4C} x X CL 395.1 �1'X l 398.4 3392.4 X r �7 404.6 398.6 X 403.3 405.9 406.1 1 x 393.5 39.1 � � � � � X400.$ x X X X % 1 3g7.2 � X 391-7 ,� 399.2 405. I 403.3 X 96.5 403.2 x 4p3.1 X x \ ` X Q 13 401.5 x 405.5 X 401.8 4n 1.9 \� 393.6 393.2 _ t.S x 404.3 4A7.6 X X 3g4.4 x x x �� X X 402.1 4x06.6 40H.7 X / 4p0 X 92.3 s��.t� 396.1 �Y A X +.07.2 X 4056 D X 402.5 X x 40t . 4.4 X 401.4 0X 407.E X X 404.1 394.6 394.2 402.9 39t 3.5 5.3X 4047 405.t-1 9401.4 4x4.403.6 X64 i J X 403. X 404.6 7t X X 404 - 406.4 i r 394.6 x 3g7.4 1 400.1 402.405 7 X 403.9 X 406.3 X I X X X x X 406.4 X 4�7.7 39BX 4 406.9 % 4p2.5 ;04j1 x x 39 ED A 400.4 ,404.5 A 4p x X X 5.9 396.4 395X x 396.1 X 402.7 7[ 4p►� 404 ° X 3965 X 406.9 405.1 X 3g7 6 96.4 405.9 7.6 % 445.4 x % 39`.3 39 .5 399.4 406.8 X 4p5 6 X 400.3 �t'S x 407.7 7� 395.24 y4 403.9 407-6 397.6 399.1 X 405.9 407.1 X x 4,07.1 jH.5 X X 397.4 X X Y 396.9 x x $T' x 397.4 40a.4 �?� �,W.35byTN 398• 398. x396.7 x399•J X 407.0 4 4 X 3g7.5 X X V 397•7 X �s 39H.5 X 403.m 402 y � I )2.5 X x X X 44t.6 399.4 401.5 395.1 396.4 395..2 43 X 411.3 412.1 J A.g- 4p6'5 x )( r % x X X lFE_�DO 396.9 5 397.9 x = - 3 408 398. X 402.2 412. X X 399.5 X 398.0 X D DO X )1.4 X X X 411.6 X 9.9 X C7.2 395.3 39H.0 j9 399.0 X X X 40 0 �c 412.5 X 400.9 X 400.0 , X 409.2 39gx X A 1?�9.3 395.9K X_ - 399.3 399.5 40H-2 X 401.0 39 X ^ X 411 6 �9 S �g iris � •.� _ r r. .�, _+r- =,.q� ..� � � Z"�-..�� ►� fir .�i i t '�y �•. �4 ' �`- ••- r li +ry+�r.t ��5 IAA r k� `. N - _ ••,�! 1 +-`j +{ ILlr �_:.�. r "fix. _ .� • _ - - I •y i 7 i�.i- ,t} .rs �wr. i 1 -'mil � _ F� id �- .� _ � L� .i �.,L- •_ �� •ter ,r ., + Al - +ice � •^ • ..��+ �� -.\.: _ i yf ; I r � LR 110 r ! op Irk Jr i+ e • _ r • �~ - ' .may 1 tall', 15 DOWNSTREAM ANALYSIS 21st AVE. SW CB #1 (at Butz property, west side of 21st Ave. SW) Rim = 389.0 IE = 383.6 300 LF 36" conc. pipe sloping down to the north at 1.03% CB #2 Rim = 385.72 IE = 380.52 300 LF 36" conc. pipe sloping down to the north at 1.16% CB #3 Rim = 382.22 IE = 377.04 300 LF 36" conc. pipe sloping down to the north at 2.97% CB #4 Rim = 374.42 IE = 368.12 354 LF 36" conc. pipe sloping down to the north at 0.74% CB #5 Rim = 371.70 IE = 365.50 315 LF 36" conc. pipe sloping down to the north at 2.61% CB #6 Rim = 363.58 IE = 357.28 No restrictions or flooding problems were observed. Date visited: February 25, 1994 Weather: overcast/showers 9 Al MS --dnV �S %,L,L,'Z =S Z ,0)I'I _s d IV. RETENTION/DETENTION ANALYSIS AND DESIGN On -site subbasin, existing condition - 0.398 acres, young forest, SSG "C", C14=81 On -site subbasin, developed condition - 0.325 acres paved/rooftop, CN=98, 0.073 acres landscape area, CN=86. Off -site - see section III. See Basin Summary Report for additional information such as time of concentration calculations. Increase in peak runoff rate for the 100 year, 24 hour storm is, less than 0.5 cfs, therefore, detention is not required. 789.9 390.0 386.2 X ^ jO 3y2.] X -393.55 �C.a , B. X X 4X 385.. X ] j 55.7 X J 398.i �3b Xl 3X ' 94. 9 x ` �.0 7.7 X 402.3 402.6 4p�.1 x �r 38b.'9� l N 3b7 .7 383 6 S9X 'S• X X x X 398.5 l 390.8 X 403. X X I 3E7.2 X 396.9 W53 .�r 400.6 (` / /339.9 X X 392•5 X N X3b6.7 X3S5.5 3b6.1 X 400.9 97.7 395.9 403.E X 390.7 I j92 1 l X 399.1 1 39% 9 1 395.9 X 4013 �0.9 397.4 �395.Y X x a 40515 l`1 88.6 � 7C X X 406.4 40 4... X 5 398.7 .5969 7c . 390.3 1 � 390.1 x� X 2 X 397.7 403.. 393.3 3g1.9 X l X 3gl.4 402. X x l 402.3• X X 1.9 4p1.3 X I 89.9 39 •2 < �) % X 9• 402.5 X X 403.4 39 . 397.9 c X 401.3 401.9 408.. 391.1 I I 4 1�.5 X X X 392.2 / f / 395.7 403.2 405.1 4 % \ 396. X X 3g1.0 % X X395.3 401.5 X;03.6 gfi.b X ✓ I X g 392 2 1 401.4 X X 403.7 405.E 90. - XX -,5Ok.! c� 395.1 4G5 40t.1 8.4 l 9 4 L- 404.6 39b.6 �c -� X 3 393.5 393.1 �392. X i �J x 4033 059 % 406.1 X 1J x400.8 X 3g7.2 � IJ 391.7 � x 3g6 5 403.2 3g92 4fl 403.3 X X X 403.1 393.6 383 X 401.8 405.5 X 404.3 407 .6 1 401.8 40-1-91.9 s j X X.2 401 X 6 / x 394.4 X 42.3 X 402.1 %B• % 408.7 X 400.6 396.1 X � X X 4j7.2 X 395.7 X 441.5 X 4056 D % 402.E X 4.4 x 0407.6 x 401.4 ` 395.1 394.6 39 X % 402.9 X 40 4.1 7C X X 396.4 XO x 93.5 401.4 X 406. X 404.7 X x443.8 i X 6 1 4069 403.6 L x 4 x 7 403. X 404.6 is X X 404.5 4; % r 4s 394.6 3g7' �0.: 402,5 1 405 7 x 403.9 406� X 406 X X X x 406.4 407.7 X 39B.6 X6.4 40 9 X 41 % 4C % 396.9 4Q0.4 1 404'SX 40405.9 4025 X X � 396.4 395- X 396.1 X l 402.7 X % X X X X �X 4 E X XX X 404.0 396.5 X 406.9 4A5.1�- X 397.6 96.4 397.3 397xE 399.E 405.9 4076 4jD6.8 406.4 401.5 % 405 6 395.2 400.3 x 40+3.9 407.6 4077 7.6 X X 399.9 407.1 X 4071 X13g7.4 X 405. 1.5 396.404.2 � X XT. X 397.4 4,00.4 402.9 S.W.Sw. 356TM 399.3 % 407.0 7 397. X39b• X395.4 Y. X X 395.5 397 x I �C •5 X 403.8 402.7 11I x jg9.4 401.5 X X 0� J401.6 � 398. 1 41D 411.3 412./ X 39b.1 398.4 2 )( 9- X �� X % X. x % 3g8.'9� 3g7.9 X 3g8.5 X 402.2 obo � 412.3 40E X 399.5 X 3gb.0 .4 X X X X 411.6 X X 396.9 C1.2 395.3 398.0 399.0 X , X X X 40 O p0.9 412.5 X 400.0 X 39b•9 4092 % 9.3 396.9� A X 399.3 399.5 X 1' .5 4pb-2 X ` i01.0 39 0 X ^ _ X 411.6 409 b9 • '� 1 rrr rMIN •ss i + `�� # ,i`'ti• ri"..Y�. . -yr r R- �' r w-- x �= e. � .Y,_,�+ r co gr Ott pr �• �"r" r'�..�� ia•r.rar..r_W_ ! �Ci ... �, � r 1: 1 �`i'••E It �3i' r,.ipCA�i�%►- � ii �'�;-�!'_� ..ti i�.. .�� •fi; �r •r.f. � r 71 ,` + r3'^L M .S a ^•• r �r� �{iy -} ".t R•-.4Eq. '4 - r �� + �. f � ji �= � ._��.. r :i^ �� yeti � �"' y�,' i� i ji��"J � ■" :t•�r..�i.�a.�r�.+•. '!� � _ .f� - it `l +- Err .►7•• '► ' If At •- •-� Kai,,,, �. ,' 4_�' R'!•/. • j•�^'I 1' It 41 _ ri rr — era • ol r \ '� �" - �I� •n. •�. k•. '� �. - of IV Oro t ` 1, �" . •$ • : err .`^�� `L`F �•! uk ZU 8/10/94 Bennett PS & E ROW BUTZ COMMERCIAL SITE 94-3543 CITY OF FEDERAL WAY -_---_-_-_ T BASIN SUMMARY BASIN ID: 2D NAME: 2 YEAR DEVELOPED CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPE1A PERVIOUS AREA PRECIPITATION....: 2.13 inches AREA..: 0.07 Acres TIME INTERVAL....: 10.00 min CN....: 86.00 TIME OF CONC.....: 3.48 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.33 Acres CN..... 98.00 TcReach - Sheet L: 110.00 ns:0.0110 p2yr: 2.13 s:0.0100 TcReach - Channel L: 107.00 kc:42.00 s:0.0040 TcReach - Channel L: 100.00 kc:17.00 s:0.0200 PEAR RATE: 0.16 cfs VOL: 0.06 Ac-ft TIME: 470 min BASIN ID: 2E NAME: 2 YEAR EXISTING CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPE1A PERVIOUS AREA PRECIPITATION....: 2.13 inches AREA..: 0.40 Acres TIME INTERVAL....: 10.00 min CN....: 81.00 TIME OF CONC.....: 44.15 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.00 Acres CN....: 98.00 TcReach - Sheet L: 135.00 ns:0.8000 p2yr: 2.13 s:0.0400 PEAR RATE: 0.03 cfs VOL: 0.02 Ac-ft TIME: 490 min BASIN ID: 20S NAME: 2 YEAR OFF -SITE SBUH METHODOLOGY TOTAL AREA.......: 1.59 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPE1A PERVIOUS AREA PRECIPITATION....: 2.13 inches AREA..: 1.04 Acres TIME INTERVAL....: 10.00 min CN....: 81.00 TIME OF CONC.....: 109.71 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.55 Acres - CN....: 92.00 TcReach - Sheet L: 300.00 ns:0.8000 p2yr: 2.13 s:0.0270 TcReach - Shallow L: 350.00 ks:3.00 s:0.0270 PEAK RATE: 0.12 cfs VOL: 0.12 Ac-ft TIME: 550 min page 4 Syd Syd w u c 44 r u Q Tine in Hours No.: 1 Rate: 0.16 cfs Time: 7.83 hr 2VPA�, ��' S'��rv� Vol 0.06 Ac-ft Int: 10.00 min lOCU&pcA No.: 2 Rate: 0.03 cfs Time: 8.17 hr 2yea� 24�QurSh7✓ Vol : 0.02 Ac—ft Int: 10.00 min 015+1n� Cq►tii+is ZL 8/10/94 Bennett PS & E RON BUTZ COMMERCIAL SITE 94-3543 CITY OF FEDERAL WAY -- BASIN SUMMARY BASIN ID: 25D NAME: 25 YEAR DEVELOPED CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPE1A PERVIOUS AREA PRECIPITATION....: 3.43 inches AREA..: 0.07 Acres TIME INTERVAL....: 10.00 min CN..... 86.00 TIME OF CONC.....: 3.48 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: -0.33 Acres CN....: 98.00 TcReach - Sheet L: 110.00 ns:0.0110 p2yr: 2.13 s:0.0100 TcReach - Channel L: 107.00 kc:42.00 s:0.0040 TcReach - Channel L: 100.00 kc:17.00 s:0.0200 PEAR RATE: 0.27 cfs VOL: 0.10 Ac-ft TIME: 470 min BASIN ID: 25E NAME: 25 YEAR EXISTING CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPE1A PERVIOUS AREA PRECIPITATION....: 3.43 inches AREA..: 0.40 Acres TIME INTERVAL....: 10.00 min CN..... 81.00 TIME OF CONC.....: 44.15 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.00 Acres CN....: 98.00 TcReach - Sheet L: 135.00 ns:0.8000 p2yr: 2.13 s:0.0400 PEAR RATE: 0.08 cfs VOL: 0.05 Ac-ft TIME: 490 min BASIN ID: 25OS NAME: 25 YEAR OFF -SITE SBUH METHODOLOGY TOTAL AREA.......: 1.59 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPE1A PERVIOUS AREA PRECIPITATION....: 3.43 inches AREA..: 1.04 Acres TIME INTERVAL....: 10.00 min CN....: 81.00 TIME OF CONC.....: 109.71 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.55 Acres CN....: 92.00 TcReach - Sheet L: 300.00 ns:0.8000 p2yr: 2.13 s:0.0270 TcReach - Shallow L: 350.00 ks:3.00 s:0.0270 PEAK RATE: 0.29 cfs VOL: 0.26 Ac-ft TIME: 540 min page 3 L '�) Hyd Hyd C A No.: 3 Rate: 0.27 cfs Time: 7.83 hr Vol 0.10 Ac-ft Int: 10.00 min No.: 4 Rate: 0.08 cfs Time: 8.17 hr Vol : 0.05 Ac-ft Int: 10.00 min s^- 2sy n.4 �Xf3tti� CrY�►fi 7'^ 8/10/94 Bennett PS & E page 1 RON BUTZ COMMERCIAL SITE 94-3543 CITY OF FEDERAL WAY BASIN SUMMARY BASIN ID: 100D NAME: 100 YEAR DEVELOPED CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPEIA PERVIOUS AREA PRECIPITATION....: 4.32 inches AREA..: 0.07 Acres TIME INTERVAL....: 10.00 min CN....: 86.00 TIME OF CONC.....: 3.48 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.33 Acres CN....: 98.00 TcReach - Sheet L: 110.00 ns:0.0110 p2yr: 2.13 s:0.0100 TcReach - Channel L: 107.00 kc:42.00 s:0.0040 TcReach - Channel L: 100.00 kc:17.00 s:0.0200 PEAK RATE: 0.35 cfs VOL: 0.13 Ac-ft TIME: 470 min BASIN ID: 100E NAME: 100 YEAR EXISTING CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPElA PERVIOUS AREA PRECIPITATION....: 4.32 inches AREA..: 0.40 Acres TIME INTERVAL....: 10.00 min CN....: 81.00 TIME OF CONC.....: 44.15 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.00 Acres CN....: 98.00 TcReach - Sheet L: 135.00,ns:0.8000 p2yr: 2.13 s:0.0400 PEAK RATE: 0.13 cfs VOL: 0.08 Ac-ft TIME: 490 min BASIN ID: 10005 SBUH METHODOLOGY TOTAL AREA.......: RAINFALL TYPE....: PRECIPITATION....: TIME INTERVAL....: TIME OF CONC.....: ABSTRACTION COEFF: NAME: 100 YEAR OFF -SITE 1.59 Acres BASEFLOWS: 0.00 cfs TYPElA PERVIOUS AREA 4.32 inches AREA..: 1.04 Acres 10.00 min CN....: 81.00 109.71 min IMPERVIOUS AREA 0.20 AREA..: 0.55 Acres TcReach - Sheet L: 300.00 TcReach - Shallow L: 350.00 PEAK RATE: 0.41 cfs VOL: CN....: 92.00 ns:0.8000 p2yr: 2.13 s:0.0270 ks:3.00 s:0.0270 0.36 Ac-ft TIME: 540 min Hyd Hyd 1 w U C e 1 1 Q Tine in Hours No. 5 I �p f 24 t'1 p �' Ste_ Rate: Vol 0.35 0.13 cfs Time: Ac-ft Int: 7.83 hr 10.00 min IDQo&pe,�. Cwdifio'y, No.: 6 Rate: 0.13 cfs Time: 8.17 hr nq ham►'' Sty IDDY$Qr, ON 0.08 Ac-ft Int: 10.00 min eXJSJ1nj CDY` ii+jDn V. CONVEYANCE SYSTEM ANALYSIS AND DESIGN On -site pipes are 1211, and are sufficient to convey the 25 year, 24 hour storm. See nomography. Biofiltration swale sized to treat 2 year, 24 hour storm with 1 foot of freeboard, and convey 100 year, 24 hour storm without overtopping. See calculations. Cross pipe in 21st Ave. SW will be flattened to a 0.5% slope and enlarged to 18" diameter to maintain approximately the same capacity. Existing storm system is 36" diameter, assume sufficient capacity. �G��IC fiy Ofi i L W j.; ape i n pa,vk-�cA CA- cv"- L KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL FIGURE 4.3.4A NOMOGRAPH FOR SIZING CIRCULAR DRAINS FLOWING FULL 1000 900 800 .0001 2.0 700 H r 600 .0002 ~ 500 Minimum .0003 Allowabie 400 •0004 .0001 Velocity .0005 (Flowl ng 300 120 .0008 _:a Full) .0008 — .0002 108 N .001 w 0 :�:-.0003 200 96 ii -;.0004 90 c .002 �-.0005 4.0 -84 ' .0006 ` 78 O .003 �.0008 72 w .004 001CL 66 w 005 5 0 100 60 O .006 N O Z 90 54 j 008 -D.-.002 O 80 48 - .01 6.0 70 w 4204 .0 cWl- �? 60 U 02 .005 Cr w 7.0 u- 50 Z 36 .006 u- CL U Z 33 30 008 LLI a w w 8.0 40 w � 27 .04010 O U. .051 1 Z 9.0 x 2 30 O 24 .08.020 H 10.0 C.)x 21 .10 .030 U Ej 20 w 18 .040 Lu Q 15 .060 p .080 12 .100 10 10 9 SAMPLE USE 8 7 8 24" dia. CMP @ 2% slope yields 20.0 6 17cfs @ 5.2 FPS velocity (n = 0.024) 5 L 6 Values per Manning's Equation 4 Q= ( 1.49� ARZ/3s 3 n ° 30.0 This table can be converted to other "n" values by applying 2 formula: 40.0 Qi n1 02 n2 L1 . (7 , 012 4.3.4-18 % q 1/90 S - o. o05 CA-P!t-�. c Rein 8�� D�� 8u.:ld�hq Ala p. 4-0 LtC,rGS Pe L2 �2= 2 p _ 3: per, _ o „ T,, b� %3 �cwe�r► t" -Sl-Beet%w 1 16 4-- L.F pLpe _ ( o Vo V _ ke s� 20 �o v 1 Zfp,5j - 1/pL,oe= D, 339 fps Tc Qz b2, ass= Z,�cv Z5 �fob6,ov ��03 _o.s2 4 4 S L� LZs= (50 = Q (oAf a�3 1<50p1 y �INNNN NNNN Z mw s = 3.4 2 ( 0.&42-) = Z. Zo « � L = 4.2DC�a�o� �.qS 11-1K CIFS p.goCZ.Zo ) 0'40 o. 79 o CRY OF 30 PUBLIC WORKS DEPARTMENT BIOSWALE -CALCULATION WORKSHEET Project Name: U � tCA 1� b440ate: Project No.: _ By: I:bd1 : ' 1. 2 yr./24 hr. Existing Q= d• �� cfs (See note) 2. 25 yr./24 hr. Developed Q= , 2 ! cfs 3. 100 yr./24 hr. Developed Q= �. 3S cfs Note: Use developed Q if R/D is downstream of bioswale or no R/D is proposed. BIOFUNCTION DESIGN 4. Select design flow depth/vegetation type: %"--6� S'gn, depth = 0.08' A. Urban (LaW B. Rural (Na r ) 4' D n depth = 0.33' C. Wetland et 8" Design depth = 0.67' Deign depth= [Recommended: 0.08' or 0.33'] 5. Calculate Swale Q and V given: N = 0.1 S = 0.02 ft/ft Side slopes = 3:1 (H: V) d = 0.08', 0.33' or 0.67' (per item 4, above) b = make an initial assumption. 140} Q = W-cfs V = 4 fps Calculated Q must be >_ item 1 Q. Calculated V must be <_ 1.5 fps. devrev\biowrlcsb Revised: 2rM94 1 b— ft. � � v, 25 -FL Z 2, oS p, IZ2 5I '.-EQUIVALENT AREA 6. If the proposed bioswale is less than 200 lineal feet in length, it may be shortened. The minimum length is 50 feet. The minimum length of any segment is 50'. `()( Mr o�i ti Biofunction area (sq. ft.) = 200 ft. x wetted perimeter�� 200 ft. x Zy ft. = sq. ft. Equivalent wetted perimeter = biofunction oposed length �sq ft. / / 0 O ft. = ft. b ACTUAL BIOSWALE CAPACITY AND VELOCITY FOR 2 YR. EVENT 7.a. Calculate swale Q given: N = 0.1 S = Actual (0.005 to 0.06 ft./ft.) [Recommended: 0.02-0.04 ft./ft.] S = 0,005, Side slopes = 3:1 (H: V) d = per item 4 d= b = per item 5 or 6 [Recommended: 2' min., S' max.] b= ft. Q = /0. 1 � (5 cfs i D . I (v �.S Calculated swale Q must be >— item 1 Q. 7.b. Calculate swale V given: N = 0.1 S = per item 7.a. Side slopes = 3:1 (H: V) Q = per item 1 b = per item 5 or 6 V — fps Calculated V must be S 1.5 fps. -n I �= 0,1g� S= D. C� ft/ft. Q= ❑, 1 cfs. b= ft• Travel time = length of swale/V x 60 100 ft, / 02 fps x 6o sec/min = �• �. [Recommended: 9 minutes, 5 minutes minimum]../ dwmv\biowAmh Revixd: 2=94 2 3Z y►FREEBOARD FOR 25 YR. EVENT 8. Calculate actual flow depth for 25 yr. event. N = 0.027 S = Actual Side slopes = Actual (H: V) b = Actual Q = per item 2. S= D ODS ft./ft. H: V b Q= cfs depth required= <01�o-7 ft. depthprovided = freeboard= ft. Top of swale must be >_ 6" above 25 yr. water surface elevation. FREEBOARD AND VELOCITY FOR 100 YR. EVENT 9. Calculate actual flow depth and velocity for 100 yr event. N = 0.027 S = Actual S = D 005- ft./ft. Side slopes = Actual (H: V) 3 H • 1 V b = per item 5 or 6 b ft. Q = per item,3. Q= �cfs. depth required = 0,�/ Z ft. depth provided = l r ft. freeboard= ft. ---107k I cjet-,� _ Top of swale must be at or above 100 yr. water surface elevation. V = D �377 fps ,tf-ptG Calculated V must be 5 5 fps. A — Q, 1-03 wp devrev\biowrksh Revised: 2=94 3 3 7' G"FREEBOARD 2~ 3'- 3 BIOFILTRATION SWALE X-SEC. SCALE: >" = 2' J-7 VI. SPECIAL REPORTS AND STUDIES N/A 3 5S VII. BASIN AND COMMUNITY PLANNING AREAS N/A VIII. OTHER PERMITS N/A 3� IX. EROSION/SEDIMENTATION CONTROL DESIGN IX. EROSION/SEDIMENTATION CONTROL DESIGN Erosion and Sedimentation Control devices: An interceptor swale will collect runoff from the site during construction and convey it to the biofiltration swale and to the existing storm system in 2Ist Ave. SW. Other measures to be utilized are silt fence, temporary construction entrance, revegetati.on of disturbed areas as soon as is practical., and construction sequence indicating timing of construction and placement of temporary erosion and sedimentation control measures. 31 X. BOND QUANTITIES WORKSHEET, RETENTION/DETENTION FACILITY SUMMARY SHEET AND SKETCH, AND DECLARATION OF COVENANT Crrr Or - N_ -�6 IN) BOND QUANTITIES PRICE SCHEDULE The unit prices shown on this schedule are recommended minimum prices consultants shall follow when completing the BOND QUANTITIES WORKSHEET for engineering deviate from this schedule unless plan submittals. Unit prices may not prior approval is obtainer} prom toe Den-irtment of Public Works. UNIT PRICE UNITS UNIT PRICE UNITS ROAD CONSTRUCTION • Clearing &Grubbing MISCELLANEOUS Ex ■ Excavation &Embankment 7.00 LS CY x Rip Rap Outfall Protection 17.00 CY x Pavement & Rock Base 10.00 SY x Access Road/Bollards 500.00 LS ■ Cement n Curb/Gutter 9.00 LF x Fencing (around pond) 10.00 LF ■ Extruded Asphalt Curb 4.00 LF a infiltration Trench w112" PerF PPG 18_00 LF * Concrete Sidewalk 9.00 LF ■ Flow Spreader/Dispersion Trench 20.00 LF ■Trash Racks 200.00 ea DRAINAGE PIPE ■ Owfiltration Swale 6000.00 ea. E 6" Pipe ■ 8" Pipe 7.50 LF RET ".!NlNG WALLS & STB�JCTURES x 12" Pipe 10.00 15.00 Rr LF ■. P_ raining Walls 8.00 SF w 18" Pipe 20.00 LF ■ SiAges _ x 24" Pipe 26.00 "' Rockery Facia Walls 7.00 SF x 36" Pipe ■ 48" Pipe 40.00 LF TRAFFIC CHANNELIZATION w 54" Pipe 50.00 60.00 LF LF Signalization - LS a 60" Pipe 65.00 LF a Channelization - LS x 72" Pipe 80.00 LF SITE STAMLIZATIONIEROSION CONTROL CATCH BASINS ■ Rock Construction Entrance 300.00 ea. x Inlet &Grate 500.00 ea. a Seeding/Mulch 3000.00 Acre x C8 Type I &Grate 750.00 ■ Silt Fence 4.00 �,F x CS Type 11 48' &Grate 1400.00 ea. ■ Netting Jute Mesh 5.00 SY x CST Type 11 54" & Grate 2100.00 ea. 9 Sediment Pond Standpipe 200.00 ea. CS Type 11 72" & Grate 3400.00 ea. x Sensitive Area Fencing 3.00 LF x CB Type 11 96" & Grate 4000.00 ea. ea. SURVEYING RETENTION/DETENTION CONTROL ' Monument in Case 500.00 ea. ■ Pond Excavabon & Spillway 7.00 CY r Restrictor/Separator 12" 450.00 ea. ■ Restrictor/Separator 15" 500.00 ea. x Restrictor/Separator 18" 600.00 ea. ■ Restrictor/Separator 24" 750.00 x Vaults - 12' span 20.00 ea. CF ■ Vaults - 20' span 18.00 CIF x Gravel Access Road 10.00 LF PM591 (Rev 81931 FA BOND QUANTITIES '1lIIORKSHEET Lt i DATE: � PROJECT NO: t0/25/94 BLD 93-0686 PROJECT NAME: Ron Butz Office Building SITE ADDRESS: 35406 21st Ave. SW F11 in those items which pertain to this project and return to the Department of Public Works. UNIT PRICE UNIT Clearing & Grubbing - LS Excavation & Embankment 7.00 CY A.C. Pavement 10.00 SY Cement Cone. Curb & Gutter 9.00 LF Extruded Asphalt Curb 4.00 LF Concrete Sidewalk 9.00 LF 6' Pipe 7.50 LF 8• Pipe 10.00 LF 12' Pipe 15.00 LF 15" Pipe 16.00 LF 18' Pipe 20.00 LF 24' Pipe 26.00 LF 36' Pipe 40.00 LF 48' Pipe 50.00 LF 60' Pipe 65.00 LF 7r Pipe 80.00 LF Curb Inlet 500•00 Ea. CSType I & IL 750.00 Ea. CB Type 11- 48' 1400.00 Ea. CS Type It - 54' 210C"3 Ea. CS Type II - 72' 3400.00 Ea. CS Type II - 96' 4000.00 Ea. Detention Pipe Riser 400.00 Ea. Restrictor/Separator - 12' 450.00 Ea. Restrictor/Separator - 16- - 500.00 Ea. Restrictor/Separator - 18' 600.00 Ea. Restrictor/Separator - 24' 750.00 Ea. Fencing (around pond) 10.00 LF Rlprap 17.00 CY Rockery, Gabion & Ecology -Wall 7.00 SF Concrete Retaining Wa8 8.00 SF Excavation for Pond 7•00 CY Infiltration Trench 18.00 LF Flow Spreader/Dispersion Trench 20.00 LF Trash Rack 200.00 Ea. Wont tration Swale 6000.00 Ea. PUBLIC ROADWAY IMPROVEMENTS QUANTITY PRICE PRIVATE ON -SITE IMPROVEMENTS QUANTITY PRICE $ 0.4 Ac s CY s 1015 SY S S 135 LF $ 1,125.00 S 239 LF� s 42 LF- s 4 .00 S S S S S S 1 Ea. s 550.00 3 Ea. S S a S S S S --l-Ea. S S S S G Cy S $ 7pV S s S S S �� 11 E a . $ $ -- 1 Ea. S S S SUBTOTAL s 2,715.00 SUBTOTAL 130N.0. QUANTITIES WORKSHEET Silt Fence Seeding/Mulch Temporary Pond Standpipe Ce Interim Protection Quarry SpaWRip Rep Rock Construction Entrance Pipe ( ' diameter) EROSION/SEDIMENTATION CONTROL FACILITIES UNIT PRICE UNIT QUANTITY PRICE 4.00 LF 240 LF s 960.00 3000.00 Acre U. I Ac $ .30 U. DO 5.00 CY $ 200.00 Ea. $ 25.00 Ea. 3 Ea. ��l 0 17.00 Cy S 300'00 Ea' 1 Ea- $ 300 . 00 ---- LF $ S S s SUBTOTAL s1,635.00 The following information m7lbe completed by the City of Federal Way Department of Pubrc Works: Public Roadway Improvements $ Private On -site Improvements $ Erosion/Sedimentation Control $ SUBTOTAL $ CONTINGENCY (20%) $ TOTAL BOND AMOUNT $ 43 XI. MAINTENANCE MANUAL KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL NO. 4 - CONTROL STRUCTURE/FLOW RESTRICTOR Maintenance Component General Cleanout Gate Orifice Plate Overflow Pipe Manhole Catch Basin Defect Trash and Debris (Includes Sediment) Structural Damage Damaged or Missing Damaged or Missing Obstructions Conditions When Maintenance Is Needed Distance between debris build-up and bottom of orifice plate is less than 1-1/2 feet. Structure is not securely attached to manhole wall and outlet pipe structure should support at least 1,000 pounds of up or down pressure. Structure is not in upright position (allow up to lo% from plumb). Connections to outlet pipe are not watertight and show signs of rust. Any holes — other than designed holes — in the structure. Cleanout gate is not watertight or is missing. Gate cannot be moved up and down by one maintenance person. Chain leading to gate is missing or damaged. Gate is rusted over 50% of its surface area. Control device is not working properly due to missing, out of place, or bent orifice plate. Any trash, debris, sediment, or vegetation blocking the plate. Any trash or debris blocking (or having the potential of blocking) the overflow pipe. See 'posed Detention Systems' Standard No. 3. See 'Catch Basins' Standard No. S. Results Expected When Maintenance Is Performed All trash and debris removed. Structure securely attached to wall and outlet pipe. Structure in correct position. Connections to outlet pipe are watertight; structure repaired or replaced and works as designed. Structure has no holes other than designed holes. Gate is watertight and works as designed. Gate moves up and down easily and is watertight. Chain is in place and works as designed. Gate is repaired or replaced to meet design standards. Plate is in place and works as designed. Plate is free of all obstructions and works as designed. pipe is free of all obstructions and works as designed. See *Closed Detention Systems' Standard No. 3. See 'Catch Basins' Standard No. 5. C 1190 A-4 G641 KING COUNTY, WA-SHINGTON, SURFACE WATER DESIGN MANUAL NO.5 - CATCH BASINS Maintenance Component Defect General Trash & Debris (Includes Sediment) Structural Damage to Frame and/or Top Slab Cracks in Basin Walls/Bottom Settlement/ Misalignment Fire Hazard - Vegetation Pollution Conditions When Maintenance Is Needed Trash or debris of more than 1/2 cubic foot which is located immediately in front of the catch basin opening or is blocking capacity of basin by more than 10%. Trash or debris tin the basin) that exceeds 1 /3 the depth from the bottom of basin to invert of the lowest pipe into or out of the basin. Trash or debris in any inlet or outlet pipe blocking more than 1/3 of its height. Dead animals or vegetation that could generate odors that would cause complaints or dangerous gases (e.g., methane). Deposits of garbage exceeding 1 cubic foot in volume. Corner of frame extends more than 3/4 inch past curb face into the street (if applicable). Top slab has holes larger than 2 square inches or cracks wider than 1/4 inch (intent is to make sure all material is running into the basin). Frame not sitting flush on top slab, i.e., separation of more than 3/4 inch of the frame from the top slab. Cracks wider than 1/2 inch and longer than 3 feat, any evidence of soil particles entering catch basin through cracks, or maintenance person judges that structure is unsound. Cracks wider than 1/2 inch and longer than 1 foot at the joint of any inlet/outlet pipe or any evidence of soil particles entering catch basin through cracks. Basin has settled more than 1 inch or has rotated more than 2 inches out of alignment. Presence of chemicals such as natural gas, oil, and gasoline. Vegetation growing across and blocking more than 10% of the basin opening. Vegetation growing in inlet/outlet pipe joints that is more than six inches tall and less than six inches apart. Nonflammable chemicals of more than 1/2 cubic foot per three feet of basin length. Results Expected When Maintenance Is Performed No trash or debris located immediately in front of catch basin opening. No trash or debris in the catch basin. Inlet and outlet pipes free of trash or debris. No dead animals or vegetation present within the catch basin. No condition present which would attract or support the breeding of insects or rodents. Frame is even with curb. Top slab is free of holes and cracks. Frame is sitting flush on top slab. Basin replaced or repaired to design standards. No cracks more than 1/4 inch wide at the joint of inlet/outlet pipe. Basin replaced or repaired to design standards. No flammable chemicals present. No vegetation blocking opening to basin. No vegetation or root growth present. No pollution present other than surface film. 1/90 A-5 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL NO. 5. CATCH BASINS (Continued) Maintenance Condithms When MaInbensnae Results Expected when Maintenance Is Performed Component Defect Is Heeded Catch Basin Cover Cover Not In Place or onlyreqpa es ry in per. Coy ape is Catch basin cover is closed. atch bin maintenance. Lacking Mechanism cannot be opened by one Mechanism opens with proper tools. Mechanism Not maintenance person with proper tools. Soft Into frame have less than 1/2 inch Working of thread. Cover Difficult to one maintenance person cannot remove lid after appiying 80 lbs. of lift; intent is Cover can be removed by one maintenance person. Remove keep cover from sealing off access to maintenance. Ladder Ladder Rungs Ladder is unsafe due to missing rungs, misalignment, rust, cracks, or sharp Ladder meets design standards and allows maintenance person safe access. Unsafe edges. Grate with opening wider than 7/8 inch. Grate openings meet design standards. Metal Grates of applicable) Trash and Debris Trash and debris that is blocking more Grate free of trash and debris. than 20% of grate surface. Damaged or Grate missing or broken member(s) of Grate isinplace and meets design Missing the grate. 1190 A-6 4-7 KING COUNTY,'WASHINGTON, SURFACE WATER DESIGN MANUAL OLEO. -- m�nnfin nAnOICQC !e n Traeth Rack-M Maintenance Condidam When Makftnanca Component Defeat is Needed General Trash and Debris Trash or debris that is plugging more than 20% of the openings in the barrier. Metal Damaged/ Missing Bare are bent out of shape more than 3 Bars Inches. Bars are missing or entire barrier Is missing. Bars are loose and rust is causing 50% A-f—innifinn fn anv Bart of barrier. Results Expected When Maintenance Is performed Barrier dear to receive capacity flow. Bars In place with no bends more than 3/4 Inch. Bare In place according to design. Repair or replace barrier to design standards. ` A-7 im KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL /Y NO. 7 - ENERGY DISSIPATORS Maintenance Conditions When Maintenance Component Defect Is Needed External• Results Expeciad When MA[ntsnanca Is Performed Flock Pad Missing or Moved Only one layer of rock exists above native Replace rocks to design standard. Rock soil in area five square feet or larger, or any exposure of native soil. Dispersion Trench Pipe Plugged with Accumulated sediment that exceeds 20% Pipe cleaned/flushed so that it matches Sediment of the design depth. design. Not Discharging Visual evidence of water discharging at Trench must be redesigned or rebuilt to Water Properly concentrated points along trench (normal standard. condition is a "sheet flaw' of water along trench). Intent is to prevent erosion damage. Perforations Over 1 /2 of perforations in pipe are Clean or replace perforated pipe. Plugged plugged with debris and sediment. Water Flows Out Maintenance person observes water Facility must be rebuilt or redesigned to Top of "Distributor' flowing out during any storm less than standards. Catch Basin the design storm or it is causing or appears likely to cause damage. Receiving Area Water in receiving area is causing or has No danger of landslides. Over -Saturated potential of causing landslide problems. Intsmai• Manhole/Chamber Wom or Damaged Structure dissipating flow deteriorates to Posts, Baffles, 1/2 or original size or any concentrated Sides of Chamber wom spot exceeding one square foot which would make structure unsound. Other Defects See 'Catch Basins' Standard No. 5 Replace structure to design standards. See 'Catch Basins' Standard No. 5 1/90 A-8 C 91 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL NO. 10 - CONVEYANCE SYSTEMS (Pipes & Ditches) Maintenance Conditions When Maintenance Results Expected When Maintenance Is Performed Component Defect Is Needed Pipes Sediment & Debris Accumulated sediment that exceeds 20% Pipe cleaned of all sediment and debris. of the diameter of the pipe. Vegetation Vegetation that reducea free movement of All vgstation removed so water flows water through pipes. freely through pipes. Damaged Protective coating is damaged; rust Is Pipe repaired or replaced. causing more than 50% deterioration to any part of pipe. Any dent that decreases the cross section Pipe repaired or replaced. area of pipe dy more than 20%. - Open Ditches Trash S Debris Trash and debris exceeds 1 cubic foot Trash and debris cleared from ditches. per 1,000 square feet of ditch and slopes. Sediment Accumulated sediment that exceeds 20% Ditch cleaned/flushed of all sediment and of the design depth. debris so that it matches design. Vegetation Vegetation that reduces free movement of Water flows freely through ditches. water through ditches. Erosion Damage to See 'Ponds' Standard No. 1 See 'Ponds' Standard No. 1 Slopes Rock Lining Out of Maintenance person can see native soil Replace rocks to design standard. Place or Missing (If beneath the rock lining. Applicable) Catch Basins See 'Catch Basins' Standard No. 5 See 'Catch Basins' Standard No. 5 Debris Barriers See 'Debris Barriers' Standard No. 6 See 'Debris Barriers' Standard No. 6 (e.g.. Trash Rack) A-11 1l90 �pp "J r KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL NO. 11 - GROUNDS (Landscaping) Maintenance Conditions When Maintenance component Defect I■ Needed Results Expected When Maintenance is Performed General Weeds Weeds growing in more than Non 2£}the (Nonpoisonous) landscaped area (trees and Weeds present in Isss than 5% of the shrubs os only). landscaped area. Safely Hazard Any Presence of poison ivy or other No poisonous vegetation present In a poisonous vegetation. landscaped area. Trash or Litter Paper, ran, bottles, totalling more than t Area dear of litter. cubic foot within a landscaped area (trees and shrubs only) of 1= square feet. Trees and Shrubs Damage Umbs or parts of trees or shrubs that are Split or broken which affect more than Trees and shrubs with less than 5% of the 25% of the total foliage of the tree or total foliage with split or broken limbs, shrub. Trees or shrubs that have been blown down or knocked over. Tree or shrub in place free of injury. Trees or shrubs which are not adequately supported or are leaning over, causing Tree or shrub in place and adequately exposure of the roots_ supported, remove any dead or diseased trees. G A-12 1/90 1' eOFjC- F37,*00'33530 1ST WAY SOUTH • FEDERAL WAY, WASHINGTON 98003 May 23, 1994 Mr. Dick Tydings Interwest Development NW, Inc. 1425 - 22nd Street NW, Suite E Auburn, WA 98001 RE: SPR94-0006 - BUTZ OFFICE BUILDING 35406 21ST AVE SW, FEDERAL WAY, WA Dear Mr. Tydings: The city's Community Development Review Committee (DRC) has completed an initial technical review of the above referenced proposal. Following is a list of requirements relative to site plan requirements, landscape plan design, and construction elements applicable to your project. Planning Department: Contact Deb Barker at 661-4103 1. Site Plan Approval Requirements: a. Drawing requirements must be provided as noted below: 1. The square footage of the site needs to be shown. 2. Complete dimensions of parking stalls and drive aisles must be provided along with any driveway within 150 feet of the site. 3. Site coverage of structures, total impervious area, and landscape area, expressed as a percentage of the site, must be provided. 4. Pursuant to Federal Way City Code (FWCC 22-1445), sidewalks along the building shall be a minimum of five feet in width. Pedestrian access connecting the abutting street to interior sidewalks must also be provided. 5. Distances between the proposed structure and existing off site structures within 150 feet must be provided. 6. Existing and proposed easements must be shown. 7. The site plan and the floor plan do not reflect the same building footprint. The floor plan has a 5' x 8' mechanical room on the north side of the building. This has not been depicted on the site plan; north of the building is a future building pad. This discrepancy must be resolved. Mr. Dick Tydings May 23, 1994 Page 2 2. Landscaping: a. An approved landscape plan is required prior to final site plan approval. While the submitted landscape plan meets the general intent of the perimeter landscape code requirements, there are several features that must be amended as follows: 1. Significant trees - Pursuant to FWCC section 22-1568(c)(2) a and b, the applicant shall submit a tree retention plan concurrent with the first permit application for the development. The plan shall include a tree survey or cluster survey which identifies significant trees and a plan for retention, removal transplanting, or replacement of significant trees. The percentages retained or replaced trees shall also be identified. 2. Interior lot landscaping - Pursuant to FWCC section 22-1567(b)(1)(a)(i), twenty square feet of interior parking lot landscaping shall be provided for 40 parking stalls or less. The proposal includes 13 parking stalls which requires 260 square feet of interior lot landscaping. The submitted plans do not contain any of the required interior parking lot landscaping. Pursuant to FWCC 22-1567 (c), landscape islands shall be provided at the end of all rows of parking, for separation buffering between loading doors or maneuvering areas, and parking areas or stalls, and dispersed throughout the interior parking area in a manner to reduce visual impact of the parking lot. Interior lot landscape islands shall be a minimum of 64 square feet, and a minimum width of six feet at the narrowest point for islands at the end of 90 degree parking rows. Type IV landscaping shall be provided in the interior lot islands. 3. Street Trees - Street trees, per FWCC section 22-1525, have not been shown as part of the proposal on the landscape plan. 4. Parking Area/Screening for Rights -of -Way Parking areas adjacent to the public right-of-way shall be screened pursuant to FWCC section 22-1567 (e). The proposed screening method has not been identified. 5. Foundation Landscaping - Pursuant to FWCC section 22-1564(v), foundation landscaping is encouraged for all development to reduce the scale, bulk, and height of structures. 6. FWCC Section 22-1570 provides for flexibility within landscape designs. The Director of Community Development has authority to modify specific requirements or impose additional requirements in unique or special landscape circumstances to assure stated purpose of the section is met. The applicant may request a modification of landscape requirements. A modification may be granted subject to Mr. Dick Tydings May 23, 1994 Page 3 the criteria listed in FWCC section 22-1570(b) through (i). Landscape modification requests may precede landscape resubmittals. Any modification request should be directed to my attention. 3. Garbage/Recycling Facilities: a. Pursuant to FWCC section 22-949, storage areas for garbage and recycling receptacles for material generated on the site shall be incorporated into the designs for commercial buildings. This project is not exempt from the requirements of this section and garbage/recycling facilities that meet code requirements must be provided. 4. Other Requirements: a. A sign permit application is enclosed. The sign category for this site is D. Any questions about sign requirements should be directed to Richard Cottage, Sign Code Compliance Officer, at 661-4017. b. Site improvement bonds are required prior to issuance of the building permit. Associated maintenance bonds will be required prior to acceptance of construction and issuance of a Certificate of Occupancy. Enclosed is a bond quantities price schedule and worksheet for your convenience. c. Cumulative Development Requirements - Upon completion of the proposed office building, this site will contain more than 10,000 square feet of undeveloped land. The applicant should be advised that subsequent development may require environmental review pursuant to FWCC Chapter 18, Environmental Protection. Cumulative impacts to the entire site will be analyzed. Public Works: Contact Skip Tullock at 661-4132 Public Works review of the proposed office building has begun. The following information needs to be provided: 1. The existing contours as well as the proposed grades need to be based on KCAS or NGVD- 29 datum with the benchmark shown. 2. The width of 21st Avenue Southwest needs to be depicted. 3. It appears that the proposed biofiltration swale will need to be relocated since it will interfere with any future extension of the sewer main located on the north side of the Mr. Dick Tydings May 23, 1994 Page 4 property. In addition, an access road will need to be provided adjacent to the north half of the swale. 4. A standard drive approach needs to be provided in lieu of the existing curb cut shown on the drawings. This should be a maximum of 30 feet in width. 5. The oil/water separation structure needs to be installed upstream of the biofiltration Swale. 6. Public Works December 16, 1993, pre -application comment #5 is still applicable: "Since the proposed building site is large enough to be subdivided, the following items should be addressed: 1. The site's drive approach location as it relates to future public roads or on -site driveways. 2. The use of a joint drive approach as a way of limiting curb cuts. 3. Providing future connections between parking lots of adjacent properties to eliminate ingress and egress (from these properties) to 21st Avenue SW." Federal Way Water and Sewer: Contact Rick Gilmore at 941-2288 1. Water: As stated in the December 16, 1993, pre -application response, water is available by direct connection within 21st Avenue Southwest. Developer extension permits are required. 2. The sewers are located adjacent to the north property line of the proposed development. The developer shall extend these sewer facilities to the southern property line of the development as a conditions of sewer connection. The sewer extension easement must be 15 feet wide and set 10 feet from the building for construction clearance. This easement must be depicted on the site plan. 3. The bioswale should not be placed in the sewer easement. King County Fire District, #39: Contact Chris Ingham at 946-7242 The enclosed memorandum dated December 2, 1993, from Pat Kettenring to Lori Schill, still applies to this project. Mr. Dick Tydings May 23, 1994 Page 5 Building Division: Contact K.C. Ellis at 661-4123 Requirements for the building permit application have been listed on the enclosed Building Section Pre -development Information Checklist dated April 27, 1994. To assure that your permit proceeds in a timely manner, it is in your best interest to submit a complete package of any required additional information as soon as possible. Permits requiring additional information or resubmittals are generally handled on a first come/first serve basis. The longer time it takes to receive required resubmittals, the greater the potential for other projects to be processed before yours. Please contact me, or another appropriate staff person, if you have any questions at this time. Since ly, Deb Barker Associate Planner enc: FWCC Article Maintenance Quantities Sign Permit Application FWCC 22-949 FWCC 22-1445 Public Works Pre -Application Memorandum Fire District Pre -Application Memorandum Building Division Checklist c: \/Skip Tullock, Engineering Plans Reviewer K.C. Ellis, Lead Plans Examiner Richard Cottage, Code Compliance Officer Chris Ingham, Federal Way Fire District #39 Rick Gilmore, Federal Way Water & Sewer District sprUwVep2.1Lr eFA4C_��- 0- f9r)WOr 33530 1ST WAY SOUTH January 4, 1994 Ron Butz 1911 SW Campus Drive #353 Federal Way, WA 98003 F I L E (206) 661-4000 FEDERAL WAY, WA 98003-6210 RE: PRE APPLICATION #93-0060, B UTZ OFFICE BUILDING 35406 21 ST AVENUE SW, FEDERAL WAY Dear Mr. Butz: This letter summarizes our pre -application conference on December 30, 1993, at which time members of the Development Review Committee discussed development requirements as they will apply to your proposal. Those requirements are provided below or are enclosed. LAND USE DIVISI N (Lori Michaelson Schill, 661-4019) 1. Review process: Office buildings in the Professional Office (PO) zoning district are subject to Site Plan Review. An information bulletin on site plan review was provided to you at the meeting. You were also given a copy of the general zoning regulations that apply to offices in the PO zone (FWCC Sec. 22-696). The 1994 fee for site plan review is $1,160. A master application form (enclosed) is required along with the site plan submittal package. You should allow approximately sixty (60) days for completion of site plan review. 2. State Environmental Policy Act (SEPA): The project proposes a 1,920 square foot, single story office building with 7 parking stalls. The scope of the project does not meet any of the SEPA thresholds, so the project is exempt. Therefore, a SEPA checklist will not be required. 3. Landscape Plan: A preliminary landscape plan is required as part of the site plan submittal, prepared by a licensed landscape architect in accordance with FWCC Article XVH, Landscaping (provided to you at the meeting). In accordance with Article XVII, Sec. 11-1566, perimeter landscape buffers are required as follows: ■ Twenty (20) feet of Type III at the west property line along 21st Avenue SW. Five (5) feet of Type III at the south property line. Ten (10) feet of Type I at the north and east property lines. 11 Ron Butz January 5, 1994 Page 2 of 3 LAND USE DIVISION, cont'd. 3. Landscaping (cont'd): Interior parking lot landscaping must be provided in accordance with Sec. 22-1567, Parking lot landscaping. Also, street trees are required adjacent to 21st Avenue SW (FWCC Sec 22-1525, Local Rights of Way). Opportunities to modify landscape requirements are available pursuant Sec. 22-1570, Modification options. Perimeter landscape buffers on the portion of the lot that is to remain undeveloped may be retained in a native, pre -developed state, providing the existing vegetation meets the intent of buffer requirements. Supplemental plantings to the existing vegetation may be required. 4. Sign category "D" will apply to the project (FWCC 22-696). A sign permit must be secured under separate application. Please contact Richard Cottage, Code Compliance Officer, 661-4017, with any questions about signage. 5. The current proposal should be compatible with any future development plans as they relate to site design, traffic circulation, utilities and surface water facildies. It is understood that there is no intent to subdivide the parcel. For your information, the subdivision of commercial property requires approval of a "Binding Site Plan" and is currently reviewed under "Process III". Process III decisions are issued by the City Council following a public hearing and recommendation by the Hearing Examiner. PUBLIC WORKS DEPARTMENT (Ron Garrow, 661-4137) Refer to enclosed Public Works memorandum. BUILDING DIVISION (K.C. Ellis, 661-4123). Refer to enclosed memorandum. FEDERAL WAY WATER AND SEWER DISTRICT (Rick Gilmore, 941-1516) Refer to enclosed memorandum. FIRE DISTRICT #30 (Pat Kettenring, 839-6234) Refer to enclosed memorandum. �j Ron Butz January 4, 1994 Page 3 of 3 Also enclosed is a copy of the sign-up sheet from the meeting, and the city's guidelines for parldng standards that you had requested. Thank you for participating in the pre -application process. As you know, this is a perliminary review only, and it does not take the place of a full review of the formal application. Should you have any questions, please contact me at 661-4019, or other staff person as appropriate. Sincerely, Lori Michaelson Schill Associate Planner c: Kathy McClung, Land Use Administrator Ron Garrow, Senior Development Engineer Skip Tullock, Engineering Plans Reviewer encl: master application form Public Works comments Building Division comments Federal Way Water and Sewer District comments Fire Department comments signup sheet from meeting parking standards chart 1�3 coxmiNITY DEVELOPMENT TECHNICAL REVIEW COMMITTEE TO: Federal Way Water and Sewer King County Fire District Building Division Land Use Division Public Works TODAY'S DATE: April 13, 1994 PROJECT PLANNER: Deb Barker, Planning Technician 661-4103 PLEASE RESPOND BY: April 28, 1994 FILE NUMBER: SPR 94-0006 PROJECT NAME: Butz Office Building PROJECT ADDRESS: 35406 21st Ave SW, Federal Way PROJECT DESCRIPTION: Construct a 1,920 square foot wood framed mixed use office building on street side of 35,116 square foot site fronting 21st Avenue SW. 13 parking spaces proposed. Project reviewed under PRE 93- 0060, with Lori Schill, Dec. 1993. APPLICANT: Interwest Development NW Inc. 1425 22nd St NW, Suite E Auburn, WA 98001 Agent: Dick Tydings 939-9787 OWNER: Ron Butz (Replica Company) 1911 SW Campus Drive #353 952-6155 SEPA: Not required. (Under 4000 square feet, less than 20 parking spaces proposed.) CnTO RF.CE VED MASTER LAND USE APPLICATION DEPARTMENT OF COMMUNITY DEVELOPMENT APR 0 4 994 CITY OF FEDERAL WAY BUILDING DEPT. APPLICATION NO. _C,_P4q �- CO 0(Q 33530 lat Way South ♦ Fe&nd Way, WA 98003 Date _, J mH Agent Name of Applicant Address �";'Z S7�I ClJ. v hone 939- 2ZI z Signature Owner Name/Address (if different than applicant) Property Location — Kroll Zone Ara Legal Description 5 - Z I- D 3 # ` A4 Project Description Parcel Number(s) A/ e��ei 036z Type of Permit Required: SEPA Notice Sign Checklist Mailed Board x Site Plan Re ' w R R Land Surface Modification R R Boundary Line Adjustment Binding Site Plan R R R Short Subdivision Subdivision R R R Shoreline R R Variance R R R Conditional Use R R R Use - Process I R R Use - Process II R R R Use - Process III R R R Quasi-judicial Rezone R R R Variance R* R R Comp. Plan/Rezone R R Annexation R R Lot Line Elimination *Pre -Application Meeting R = Required * = Optional by City C Ea I V E City of Federal Way _ ag�� r APPLICATION FOR BUILDING PERMIT 99 CITY OF: FEDERAL WA`>? PLEASE PRINT SUILDINC: 11EPT, SI APPLICATION #: � r TE LOCATION Address 3 r-,1-®6 S Tenant (if known) .4,! �� Lot # Assessor's Tex # Building Owner Name Address !I City Fd I State Zip Phone (p I- z3 (o% Nature of Work a APPLICANT FA Name (F,M,L) Address City &t6ezrmState LVA Zip Z90-,j • rj Contact Person _ !Day Phone ,39 - 9 2S 7 Other Phone P�Q� 3�v- zsi Fax S ! ��9 11 BUILDING CONTRACTOR Company Name_ r � ✓LT`ty'L�ft�S� � Qlt� / t� P�r�.-� � W -�� C` Address City �� State (,-j Zip Contact PersonC� � -2 on - 9 7 o Fax 31 - 8�1 Contractor's # (card must be presented) > Al O 9 g Ec f{ Expiration Date S- g - 9 Verified ❑ Yes ❑ No )ARCHITECT Name Address City State Zip Contact Person Phone Fax LEGAL DESCRIPTION sTk Zs �- 49T/ 0 3 z X). I zs` 1cit ! f �- 5�% iv / .0 / less C� �-Z- Please Complete Reverse Side C00402 (Rev 4/031 C RUC'ITURE Er g Use A.11q- P sed Use o-;'f,� Permit includes: t3uilding Plumbing ❑ Mechanical ❑ Other Type of Work: ❑ Residential New ❑ Remodel ❑ Number of Units ❑ Deck *VcCommercial ❑ Addition El Garage ❑ Shed El Other Enter 1 st Floor 19Z0 sq ft tttt��f 2nd Floor 4& sq ft 3rd Floor A4 q sq ft Existing Floor Area r(.% sq ft Area Basement N q ft Decks sq ft Garage sq ft Proposed Total Area I qZd2 sq ft Water Availability �4 Sewer Availability )6 On -Site Septic System Availability ❑ Project Valuation S Zoning Do Lot Size 12S X Z & Existing Bldg Valuation $ I LEAN—D—E—R-- _ Name a Address City I State I Zip MECHANICAL; CONTRACTOR Contractor Name Address City State Zip Contact Phone Fox License # Expiration Date Verified ❑ Yes ❑ No PLUMBING CONTRACTOR Contractor Name Address City State Zip Contact Phone Fax License # Expiration Date Verified ❑ Yes ❑ No PLUMBING :FIXTURE' COUNT Water Closets 26& Sinks Urinals Jf- /� Bathtubs IV-4 Dish Washers /(%k Drinking Fountains MLA►,. Showers /br A Electric Water Heaters /ah Sumps /� Q Lavatories % A/.L Washing Machine oVIA Drains A&>, II CHANLCAL'>UNIT `COUNT U d - r Se/J r? -c E- P-err pw Lawn Sprinklers AJIA Other Total Fixture Count . /1 Fuel Type (electric/other) Gas Dryer Air Handling < = 10,000 CFM 15-30 Tons Length of Gas Piping Range Air Handling > = 10,000 CFM 30-50 Tons Furn <100K BTUs Gas Log Unit Heater 50+ Tons Furn > 100 BTUs Fans Miscellaneous Fuel Tanks Gas Hwt Hood Boilers Above Ground Conv Burner Duct Work 0-3 Tons Underground BBQ's Wood Stoves 3-15 Tons Total Unit Count DISCLAIMER: I certify under penalty of perjurythat the information furnished by me is true and correct to the best of my knowledge and furtherthat I am authorized by the owner of the above premises to perform the work for which permit application is made. I further agree to save harmless the City of Federal Way as to any claim (including costs, expenses, and attorneys' fees incurred in investigation and defense of such claim), which may be made by any person, including the undersigned, and filed against the City of Federal Way, but only where such claim arises out of the reliance of the City, including its officers and employees, upon the accuracy of the information supplied to the City as a part of this application. _ L _ l Owner/Agent: ► Date:_�,f/L b-ed Lg1dr1 ehd— OWNER/PROJECT K'OVI buf2 Plan Check # LiahtIng Budaet_Caiculations INTERIOR: Occupancy Description (office, Square Feet of Area (X) Watts Per Sq. Feet = Allowed Area storage, factory, etc.) (fable 5-11) Wattage 3264 EXTERIOR: Parking Area Sq. Feet of Parking Sec. 505.3.4 (X) 0.05 Watts = EXTERIOR: 1 Building Perimeter Total Perimeter (in feet) 17& (X) 7.5 watts = 13 2 p TOTAL BUILDING WATTAGE _ 4 S 3 4 Sw€t cif incLR equi re ment s 1. YES NO El Has separate switching been provided to reduce brightness in areas which are greater than 250 square feet, and which have natural light? 2. YES NO El 0 Have automatic controls been provided for exterior lighting? Mechanical Specifications EQUIPMENT LIST ENERGY FORM (Elec., Gas, etc.) COMBUSTION EFFICIENCY RATING,- (AFUE Rating Gas & Oil C.O.P. RATING E.E.R. RATING H.S.P.F. RATING COMMUNITY DEVELOPMENT TECHNICAL REVIEW COMMITTEE DATE: PROJECT PLANNER: PLEASE RESPOND BY: FILE NUMBER: PROJECT NAME: PROJECT ADDRESS: PROJECT DESCRIPTION: APPLICANT: December 8, 1993 .qo oe deWrinined) 1,0(211 Internal: December 16, 1993 With applicant: December 23, 1993 PRE 93-0060 Butz Proposed Office Building Pre -application 35406 21st Ave SW, Federal Way Construct a 1,920 square foot mixed use office and shop building on front of 35,000 square foot site. 7 parking spaces proposed. Site fronts 21st Ave SW. Ron Butz (Replica Company) 1911 SW Campus Drive #353 952-6155 Kevin Bentson (Agent/Contact) 874-3090 Public Works Office Memorandum, City of Federal Way TO: Deb Barker FROM: Skip Tullock DATE: May 2, 1994 SUBJECT: SPR94-0006, Butz Proposed Office Building, 35406 21st Avenue SW The site plan for the subject project has been reviewed and the following comments are provided: 1. The area of the site needs to be shown. 2. The impervious area needs to be listed as a percentage of the gross site area. 3. Existing contours as well as proposed grades need to be based on KCAS or NGVD-29 datum (benchmark needs to be shown also). 4. Existing as well as proposed easements need to be shown. 5. The width of 21st Avenue SW (the existing street abutting the property) needs to be shown. 6. All existing utilities (water, sewer, storm, etc.) and fire hydrant locations need to be shown. 7. It appears that the proposed biofiltration swale will need to be relocated since it will interfere with any future extension of the sewer main located on the north side of the property. In addition, an access road will need to be provided adjacent to the north half of the swale. 8. A standard drive approach needs to be provided (30 foot maximum width) in lieu of the existing curb cut shown on the drawings. 9. The oil/water separation structure needs to be installed upstream of the biofiltration swale. 10. It appears that item 5 (in our original pre -application comments) as it relates to the future subdivision of the site has not been adequately addressed. Public Works Office Memorandum, City of Federal Way TO: Lori Schill FROM: Skip Tullock DATE: December 30, 1993 SUBJECT: PRE93-0060, Butz Proposed Office Building, 35406 21st Avenue SW, 742E, 25- 21-03 The applicant will be required to upgrade 21st Avenue SW in accordance with section 22-1473 of the Federal Way City Code (FWCC). This particular street is classified as a principal arterial with a 100 foot (min) right of way and 60 foot (min) pavement width. Existing conditions include curb/gutter along bath sides of 21st Avenue SW, 48 feet of pavement (two travel lanes each direction with no curbside parking) and a 4 foot wide sidewalk (with landscape strip) on the west side. In addition, there is an existing 5 foot sidewalk (adjacent to the curb) directly north of the proposed office building site. No sidewalk exists along or directly south of the site; however, there are two existing driveway curb cuts located at the north and south ends of the site frontage. There, is existing sidewalk (4 foot wide adjacent to the curb) located on the east side of 21st Avenue SW, just north of the intersection of this street and SW 356th Street. Although no additional dedication will be required along the east side of 21st Avenue SW, street trees (on 30 foot centers) and installation of an 8 foot wide sidewalk will be required. In addition, the existing curb cut at the north end of the site will need to be closed off and replaced with full height vertical curb and gutter. A no -protest agreement shall be exectued by the applicant for future LID improvements to 21st Avenue. The applicant may request (in writing to Ronald Garrow, Senior Development Engineer) a modification, waiver or deferment of the aforementioned improvements per section 22- 1477 of the FWCC. The request must address and meet at least one of the four criteria listed in the code section. After the request has been received, it will be routed to City staff for determination of an appropriate response. The submittal of a request does not assure that a modification, waiver or deferment will be granted. 2. The applicant shall provide (with the application) a Level 1 downstream analysis and a written narrative on the relevance to the subject site of the 7 Core and 12 Special Requirements of the 1990 King County Surface Water Design Manual (KCSWDM). 3. Storm water runoff from the site shall be controlled through the use of facilities designed and constructed in accordance with the requirements of the KCSWDM. These facilities shall include, as a minimum, a biofiltration swale, oil/water separation and retention/detention (if required under Core Requirement No. 3). The site plan prepared for the project shall take into consideration the spacial requirements for these facilities and shall depict their conceptual location. 4. Final improvement plans shall be drawn on 24" x 36" size sheets at a scale of 1" =20' and a Technical Information Report (TIR) will need to be prepared for the project. Both the plans and the TIR will require the signature/seal of a Professional Engineer licensed in the State of Washington. 5. Since the proposed building site is large enough to be subdivided, the applicant should consider the following items with regard to the site design: a. The site's drive approach location as it relates to future public roads or on -site driveways. b. The use of a joint drive approach as a way of limiting curb cuts. C. Providing future connections between parking lots of adjacent properties to eliminate ingress and egress (from these properties) to 21st Avenue SW. 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Liea cp. moo. ,�a 90�� ° S sr /7.5e 89-19-42W 1993 83tl/�5o5 jo �4-0(SOer!) _� 9 �r7o92/a IZ' eZfZ0707rB�-ra' 9�/20G/G/4 .267E •Per s.� 477163 30 3D 2.a •7B s•P. — = ISe7 /So /35 _! 9f in J I cpr V m l ° AIAJ'1'LK LAIVIJ U6h A rFJLAUAl'lU1N DEPARTMENT O- .OMMUNITY DEVELOPMENT 33530 lat Way South ♦ Fc&nl Way, WA 98003 APPLICATION NO.79-f� ?J CO ('�o Date a� (?0VAPI1 y �ftw_Agent 1_41 Name of Applicant Owner a - - - Address Signature Owner Nafiie/Address (if different than applicant) Property Location — ��jn�_ IV�{dQik 1 Kroll Zone Legal Description Project Descriptio: Parcel Number(s) BER Type of Permit Required: SEPA Notice Sign Checklist Mailed Board Site Plan Review R R Land Surface Modification R R Boundary Line Adjustment Binding Site Plan R R R Short Subdivision Subdivision R R R Shoreline R R Variance R R R Conditional Use R R R Use - Process I R R Use - Process II R R R Use - Process III R R RRECEIVELi :�Y Quasi-judicial Rezone R R COMMUN4 DEVELOPMENT DE Variance R* R Comp. Plan/Rezone R R DEC 0 8 1993 Annexation R Lot Line Elimination *Pre -Application Meeting R =Required * =Optional by City P E R M I T B L DH I 1 1( k H111 Hll\l(-, I H Milli 11 illillilli 11111 NMI" X.. E W 1.53 rd 1 N R 3 EOOW*Ms E' 250 TW'Po NE 1/ 411111111111111 gamma I T u"" ERAL WAY e� th 7- A14E j. _Y.56,th Aowft� K N CUUNTY,, WASHIN(jTON T D'RAINAGE kr4OTES ER 0 SION/ SEDIMENTATION CONTROL, NOTES GENER-AL NOTES& 1. PROOF OF LIABILITY INSURANCE SHALL BE SUBMITTED T(Y THE CITY PRIOR TO THE 1. APPROVAL OF TWIS EROSION /SEDIMENTATION C�!NTROL (ESC) PLAN DOES NOT ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH THE FEDERAL%WAY CITY CODE PRE -CONSTRUCTION MEETING. CONSTITUTE AN APPROVAL OF PERMANENT RI)AD OR DRAINAGE DESIGN (E.G. SIZE CONDITIONS OF AND LOCATION OF ROAD$. PIPES. RESTRICTOF,�. CHANNELS. RETENTION (FWCC). APPLICABLE ORDINANCES. AND THE CITY COUNCIL P JECT APPROVAL. THESE DOCUMENTS ARE SUPPLEMENTED BY THE STANDARD RO 2. ALL PIPE AND APPURTENANCES SHALL BE LAID ON A PROPERLY PREPARED FACILITIES. UTILITIES. ECT.). ss 01's moo SPECIFICATIONS FOR ROAD. BRIDGE. AND MUNICIPAL CONSTRUCTION FOUNDATION IN ACCORDANCE WITH WSDOT 7-02.30). THIS. SHALL INCLUDE SCale .,, f (WSDOT/APWA).THE KING COUNTY ROAD STANDARDS (KCRS)o AND THE KING COUNTY I N LOL LEVELING AND COMPACTING THE TRENCH BOTTOM THE OF FOUNDATION MATERIAL. 2. THE IMPLEMENTATION OF THESE ESC PLANS !ND THE CONSTRUCTION. MAINTENANCE. IT SHALL BE THE SOLE . FACILITIES IS THE RESPONSIBILITY V I Co" I N I T OYO " M" A 0 rw*' SURFACE WATER DESIGN MANUAL (KCSWDM). AND REQUIRED PIPE BEDDING. TO A UNIFORM GRADE SO THAT THE ENTIRE PIPE IS REPLACEMENT. AND UPGRADING OF THESE ES' ROVED. RESPONSIBILITY OF THE APPLICANT AND PROFESSIONAL ENGINEER TO CORRECT ANY SUPPORTED 3Y A UNIFORMLY DENSE UNYIELDING BASE. OF THE APPLICANT/ CONTRACTOR UNTIL ALL CONSTRUCTION IS APP ERROR. OMISSION. OR VARIATION FROM THE ABOVE REQUIREMENTS FOUND IN THESE I k 1% 'A PLANS. ALL CORRECTIONS SHALL BE AT NO ADDITIONAL COST OR LIABILITY TO 3. STEEL PIPE SHALL BE GALVANIZED AND HAVE ASPHALT TREATMENT 01 OR BETTER 3. THE BOUNDARIES OF THE CLEARING LIMITS SHOWN ON THIS PLAN SHALL BE I? THE CITY OF FEDERAL WAY. INSIDE AND OUTSIDE. CLEARLY FLAGGED IN THE FIELD PRIOR TO CONSTRUCTION. DURING THE c CONSTRUCTION PERIOD. NO DISTURBANCE BEYI�"(ND THE FLAGGED CLEARING LIMITS I c 2. THE DESIGN ELEMENTS WITHIN THESE PLANS HAVE BEEN REVIEWED ACCORDING TO 4. ALL DRAINA(iE STRUCTURES. SUCH AS CATCH BASINS AND MANHOLES. NOT LOCATED SHALL BE PERMITTED. THE FLAGGING SHALL. BE MAINTAINED BY THE t�nI �') t . THE FEDERAL WAY ENGINEERING REVIEW CHECKLIST. SOME ELEMENTS MAY HAVE WITHIN A TRAVELED ROADWAY OR SIDEWALK. SHALL HAVE SOLID LOCKING LIDS. APPLICANT/ CONTRACTOR FOR THE DURATION 3F CONSTRUCTION. Ll- BEEN OVERLOOKED OR MISSED BY THE CITY ENGINEERING PLAN REVIEWER. ANY ALL DRAINAIj*E STRUCTURES ASSOCIATED WITH A PERMANENT RETENTION/DETENTION VARIANCE FROM ADOPTED STANDARDS IS NOT ALLOWED UNLESS SPECIFICALLY FACILITY SHALL HAVE SOLID LOCKING LIDS. 4. THE ESC FACILITIES SHOWN ON THIS PLAN BE CONSTRUCTED IN CONJUNCTION FEDERAL WAY. PRIOR TO CONSTRUCTION. WITH ALL CLEARING AND GRADING ACTIVITIE��", IN SUCH A MANNER AS TO INSURE APPROVED BY THE CITY OF R VIOLATE 5. ALL CATCH BASIN GRATES SHALL CONFORM TO KCRS DRAWING NUMBERS 41. 46. 47. THAT SEDIMENT LADEN WATER DOES NOT EN`,� R THE DRAINAGE SYSTEM 0 3. APPROVAL OF THIS ROAD. GRADING. AND DRAINAGE PLAN DOES NOT CONSTITUTE AN OR 48. APPLICABLE WATER STANDARDS. APPROVAL OF ANY OTHER CONSTRUCTION (E.G. DOMESTIC WATER CONVEYANCE. -WAY SHALL BE OF THE MINIMUM REQUIREMENTS FOR TOTAL SITE AREA 35,125 SF SEWER CONVEYANCE. GAS. ELECTRICITY. ETC.) 6. ALL DRIVEWAY CULVERTS LOCATED WITHIN THE RIGHT -OF 5. THE ESC FACILITIES SHOWN ON THIS PLAN 0, : THE EDGE OF THi`*' ''N SUFFICIENT LENGTH TO PROVIDE A MINIMUM 3:1 SLOPE FROM ANTICIPATED SITE CONDITIONS. DURING THE STRUCTION PERIOD. THESE ESC 4. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY. A PRE -CONSTRUCTION CULVERTS SHALL HAVEBEVELED END j OCATION OF DRIVE"WAY TO THE 80TTOM OF THE DITCH. FACILITIES SHALL BE UPGRADED (E.G.. ADDITI�)NAl_ SUMPS. REL rDED 'OR UNEXPECTED STORM EVENTS. 5.47 % OF TOTAL SITE AREA MEETING MUST BE HELD BETWEEN THE CITY OF FEDERAL WAY, THE APPLICANTS AND SECTIONS To), MATCH THE SIDE SLOPES. DITCHES AND SILT FENCES. ETC.) AS NE" BUILDING COVERAGE THE APPLICANT*$ CONSTRUCTION REPRESENTATIVE. 7. ROCK FOR EROSION PROTECTION OF DITCHES. CHANNELS AND SWALES. WHERE 6. THE ESC FACILITIES SHALL BE INSPECTED oAtt-Y BY THE APPLICANT /CONTRACTOR I sj 5. A COPY OF THESE APPROVED PLANS MUST BE ON THE JOB SITE WHENEVER - , k I REQUIRED# NiUST BE OF SOUND QUARRY ROCK. PLACED TO A DEPTH OF I FOOT AND AND MAINTAINED AS NECESSARY IT ENSORE T EIR CON11NUED FUNCTIONING. CONSTRUCTION IS IN PROGRESS. MUST MEET THE FOLLOWING SPECIFICATIONSf-A 4*-8*ROCK/4O%-7O% PASSING- AND TS, WHERE NO LANDSCAPING 41777 SF 13.6 %OF TOTAL -2' ROCK/10%-20% PASSING. INSTALLATION SHALL BE IN ACCORDANCE WITH KCRS 7. ANY AREA STRIPPED OF VEGETATION. INCLUDI;�tG ROADWAY EMBANKMEN SITE AREA 6. CONSTRUCTION NOISE SHALL BE LIMITED AS PER FEDERAL WAY CITY CODE DRAWING NUMBER 51 OR AS AMENDED BY THE APPROVED PLANS. RECYCLED ASPHALT FURTHER WORK IS ANTICIPATED FOR A PERIOD OF 15 DAYS. SHALL BE (SECTION 22-1006): NORMALLY THIS IS 7 A.M. TO 8 P.M.. MONDAY THROUGH OR CONCRE*rE RUBBLE SHALL NOT BE USED. IMMEDIATELY STABILIZED WITH THE APPROVEr,l,ESC METHODS (E.G. SEEDING. SATURDAY. MULCHING. NETTING. EROSION BLANKETS. ECT10,' 8. LOTS NOT APPROVED FOR INFILTRATION SHALL BE PROVIDED WITH DRAINAGE ENTION. SHALL 7. IT SHALL BE THE APPLICANT" S /CONTRACTOR* S RESPONSIBILITY TO OBTAIN ALL OUTLETS (STUB -OUTS). STUB -OUTS $HALL CONFORM TO THE FOLLOWING* 8. ANY AREA NEEDING ESC MEASURES. NOT RE01,11RING IMMEDIATE ATT EARTH WORK VOLUMES AND AREA SSARY BEFORE INITIATING OFF -SITE WORK WITHIN BE ADDRESSED WITHIN 15 DAYSIO CONSTRUCTION EASEMENTS NECE 300 CY THE ROAD RIGHTS-OF-WAYO A. EACH OUTLINE SHALL BE SUITABLY LOCATED AT THE LOWEST ELEVATION ON E INSPECTED AND MAINTAINED CUT THE LOT. SO AS TO SERVICE ALL FUTURE ROOF DOWNSPOUTS AND FOOTING 9. THE ESC FACIL�TIES ON INACTIVE SITES SHAL' '_ 8 'W�� """ 1, 8. FRANCHISED UTILITIES OF OTHER INSTALLATIONS THAT ARE NOT SHOWN APPROVED SET DRAINS. DRIVEWAYS. YARDDRAiNS. AND ANY OTHER SUB-SURFACEDRAINS A MINIMUM OF' ONCE A MONTH OR WITHIN T�iL 48 HOURS FOLLOWJN'G� A FILL 200 CY ON THESE APPROVED PLANS SHALL NOT BE CONSTRUCTED UNLESS AN NECESSARY TO RENDER THE LOTS SUITABLE FOR THEIR INTENDED USE. EACH EVENT. OF PLANS THAT MEET ALL CITY REQUIREMENTS AND THE REQUIREMENTS OF KCRS OUTLET SHALL HAVE FREE -FLOWING. POSITIVE DRAINAGE TO AN APPROVED IMPERVIOUS AREA 139400 SF CHAPTER 8 ARE SUBMITTED TO THE CITY OF FEDERAL WAY AT LEAST THREE DAYS SEDIMENT BE ALLOWED TO ACCUMULATE STORMWATER CONVEYANCE SYSTEM OR TO AN APPROVED OUTFALL LOCATION. 10. AT NO TIME SHALL MORE THAN ONE FOOT 0r PRIOR TO CONSTRUCTION. f WITHIN A CATCH BASIN. ALL CATCH BASINS PA'i'ND CONVEYANCE LINES SHALL BE B. OUTLETS ON EACH LOT SHALL BE LOCATED WITH A FIVE-FOOT HIGHo 2 X 4 CLEANED PRIOR TO PAVING. THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT 9. VERTICAL DATUM $HALL BE KCAS OR NGVD-29. STAKE MARKED "STORMO. THE STUB -OUT SHALL EXTEND ABOVE SURFACE LEVEL. LADEN WATER INTO THE DOWNSTREAM SYSTEMO 10. GROUNDWATER SYSTEM CONSTRUCTION SHALL BE WITHIN A RIGHT-OF-WAY, OR BE VISIBLE AND BE SECURED TO THE STAKE. 11. STABILIZED CONSTRUCTION ENTRANCES AND WASH PADS $HALL BE INSTALLED AT APPROPRIATE DRAINAGE EASEMENTS. BUT NOT'UNDERNEATH THE ROADWAY SECTION. C. PIPE MATERIAL SHALL CONFORM TO UNDERDRAIN SPECIFICATIONS DESCRIBED THE BEGINNING OF CONSTRUCTION AND MAINTAINED FOR THE DURATION OF THE DATUM HYDRANT, TOP OF CAP BOLT ALL GROUNDWATER SYSTEMS MUST BE CONSTRUCTED IN ACCORDANCE WITH THE IN KCR3 7.04 AND. IF NON-METALLIC. THE PIPE SHALL CONTAIN WIRE OR PROJECT. ADDITIONAL MEASURES MAY BE RE��,UIRES TO INSURE THAT ALL PAVED 65't NORTH OF NORTH* R. WSDOT/APWA STANDARD SPECIFICATIONS. OTHER ACCEPTABLE DETECTION. AREAS ARE KEPT CLEAN FOR THE DURATION OF THE PROJECT. 11. ALL UTILITY TRENCHES IN THE RIGHT-OF-WAY SHALL BE BACKFILLED WITH 5/8 D. DRAINAGE EASEMENTS RE REQUIRED FOR DRAINAGE SYSTEMS DESIGNED TO 12. DURING THE TIME PERIOD OF NOVEMBER I THRO"'jGH MARSH 31. ALL PROJECT INCH CRUSHED ROCK. CONVEY FLOWS THROUGH INDIVIDUAL L6TS. DISTURBED AREAS GREATER THAN 5.000 SO4RE FEET. THAT ARE LEFT UNWORKED FOR MORE THEN 12 HOURS. SHALL BE COVEREIJ BY ONE OF THE FOLLOWING COVER 12. ALL UTILITY TRENCHES SHALL BE BACKFILLED AND COMPACTED TO 95% DENSITY. E. THE APPLICANT/ CONTRACTOR IS RESPONSIBLE FOR COORDINATING THE MEASURES: MULCH. SODDING. OR PLASTIC COVI-RING. -OUT CONVEYANCE LINES WITH RESPECT TO THE LOCATIONS OF ALL STUB 13. ALL ROADWAY SUBGRADE SHALL BE BACKFILLED AND COMPACTED TO 95% DENSITY IN UTILITIE-S (E.G. POWER. GAS. TELEPHONE. TELEVISION). 13. ANY PERMANENT RETENTION/DETENTION FAC!'L',,'v; USED AS A TEMPORARY SETTLING ACCORDANCE WITH WSDOT 2-06.3. BASIN SHALL BE MODIFIED WITH THE NECESSARY EROSION CONTROL MEASURES AND F. ALL INDIVIDUAL STUB -OUTS SHALL BE PRIVATELY OWNED MAINTAINED BY THE SHALL PROVIDE ADEQUATE STORAGE CAPACITY. IF THE PERMANENT FACILITY IS TO R DISPERSION SYSTEM. THE 389.96 NGVD-29 14. OPEN CUTTING OF EXISTING ROADWAYS IS NOT ALLOWED UNLESS SPECIFICALLY LOT HOME OWNER. FUNCTION ULTIMATELY AS AN INFILTRATION 0 ELEVATION: APPROVED BY THE DIRECTOR OF PUBLIC WORKS AND NOTED ON THESE APPROVED FACILITY SHALL NOT BE USED AS A TEMPORARY SETTLING BASIN. NO PLANS. ANY OPEN CUT SHALL BE RESTORED IN ACCORDANCE WITH KCRS 8.03(8)3. UNDERGROUND DETENTION TANKS OR VAULTS 5HALL BE USED AS A TEMPORARY SETTLING BASIN. ON -SITE BENCH MARK 15. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROVIDING ADEQUATE SAFEGUARDS SAFETY DEVICES. PROTECTIVE EQUIPMENT. FLAGGERS. AND ANY OTHER NEEDED 14. WHERE SEEDING FOR TEMPORARY EROSION CONiROL IS REQUIRED. FAST ACTIONS TO PROTECT LIFE. HEALTH. AND SAFETY OF THE PUBLIC. AND TO CONSTRUCfloN SEOUENCE GERMINATING GRASSES SHALL BE APPLIED AT AN APPROPRIATE RATE (E.G.. HYPRANTI TOP OF CAP BOLT PROTECT PROPERTY IN CONNECTION WITH THE PERFORMANCE OF WORK COVERED BY ANNUAL OR PERENNIAL RYE APPLIED AT APIF�RQXIMATELY 80 POUNDS PER ACRE). 65 NORTH OF NORTH FP. ANY WORK WITHIN THE TRAVELLED RIGHT-OF-WAY THAT 1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY. A PRE- CONSTRUCTION 'J THE CONTRACTOR. MEETING MUST BE HELD BETWEEN THE CITY OF FEDERAL WAY. THE APPLICANTS RE STRAW MULCH FOR TEMPORARY CONTROL. IS REQUIRED. IT SHALL BE APPLIED . .. . 15. WHE INTERRUPT NORMAL TRAFFIC FLOW SHALL REQUIRE AT LEAST ONE FLAGGER FOR CONSTRUCTION REPRESENTATIVE# AND THE APPLICANT* CALL THE CITY OF AT A MINIMUM THICKNESS OF TWO INCHES. EACH LANE OF TRAFFIC AFFECTED. ALL SECTIONS OF THE WSDOT STANDARD FEDERAL WAY PUBLIC WORKS DEPARTMENT AT 666-9131 TO SET UP PRE - SPECIFICATIONS 1-07.23-TRAFFIC CONTROL. SHALL APPLY. CONSTRUCTION MEETING OR INSPECTION. 16. CONTRACTOR SHALL PROVIDE AND INSTALL ALL REGULATORY AND WARNING SIGNS 2. FLAG CLEARING LIMITS. PER THE LATEST ADDITION OF MANUAL ION UNIFORM TRAFFIC CONTROL DEVICES. 3. INSTALL S I*ABILIZED CONSTRUCTION ENTRANCE. ELEVATION: 389.96 NGVD-29 4. INSTALL FILTER FABRIC FENCE AS INDICATED ON PLAN. 17. ALL UTILITIES SHALL BE ADJUSTED TO FINAL GRADE AFTER PAVING ASPHALT 5. INSTALL OF:FSITE CATCH BASIN PROTECTION. WEARING COURSE. 6. CONSTRUCI SEDIMENT TRAP/POND. S C H E D U L E OF DRAWINGS 7. CLEAR ANI" GROB ARI':.'AS OF THE SI'T*E to BL" ROUGH GRADLD OR VILLLD. NAME.* RON BUTZ 18. ROCKERIES ARE CONSIDERED TO BE A METHOD OF BANK STABILIZATION AND 8. INSTALL INTERCEPTOR SWALES/BERMS AND CHECK DAMS. ADDRESS: 1911 S.W. CAMPUS DRIVE. #353 EROSION ONLY. ROCKERIES SHALL NOT BE CONSTRUCTED TO SERVE AS RETAINING 9. ROUGH GRADE SITE AND INSTALL STORM CONVEYANCE SYSTEM AND ERE NO* TITLE FEDERAL WAY. WA 96023-6441 WALLS. ALL ROCKERIES SHALL BE CONSTRUCTED IN ACCORDANCE WITH KCRS RETENTION/DETENTION FACILITIES. PROVIDE INLET PROTECTION WH 1 COVER SHEET PHONE*- (2 Oro) 95 2-6151 DRAWING NUMBERS 19.20.AND 21. ROCKERIES MAY NOT EXCEED 8 FEET IN HEIGHT INDICATED. FOR CUT SECTIONS OR 4 FEET IN HEIGHT FOR FILL SECTIONS UNLESS DESIGNED 10. INSTALL REMAINING UTILITIES AND BUILDING. If EXISTING ZONING ACCESS DRIVES. i ND CONSTRUCT ASPHALT PARKING AREAS. 2 PAVING AND DRAINAGE PLAN BY A GEOTECHNICAL OR STRUCTURAL ENGINEER LICENSED IN THE STATE OF 11. FINISH GRADE SITE A v 4"ll U101011 SOURCE OF WATER CITY OF FEDERAL WAY SIDEWALK3. CURBS AND GUTTERS. Will i )ORARY FR05;ION/4"7%iF--raMF-..i�TATION CONTROL PLAN YSTEM CITY OF FEDERAL WAY WASHINGTON. iT SEWER S SCALE: None CHECKED �JDATE Ju 1, 94 RASi CRB KUKER-RANKEN, INC. $,two R. T I gmajaml AV"" For: INC* A& Aft ON U 0FF1'c I G C, n n lsiii� RON BUTZ mu""& J, fn SITE AD UrNESS 'amok" 'm fs lw E w " 41 6 av TV 35 A \w 21st %. J R "v E Y u" R! S and E N(3:) I N E E R Z5 t0ow? IVE #353 197 '1 '1 !16003 wvv CAM PIJE�T FEDERAL WAY, WA �)Ov4ovob4141 C V E R SHEET Poo* BOX 1031 PUYALLUP, 98371 PUYALLUP 845-8833 SEATTL E 838-3474 Tel, (206) 952-6151 C IT Y OF FEDERAL WAY 7_7 WASHINGTO "�"j"' _T-7' 'j" I 11 111 g 1I11 m Oman AL Ah NUNN Ill 11 1111 I Aft K u U U tj b E^ MIT N B L 3 8 rN Lot G W9 Me Ak a -vm- 1 /4 T '"'I T'" A"" F F E D", E R A L WAY 11v T IflPR4P, 7x 8',t IVEEP U 11 v D Ah 'L AEO %A" W I T A 4 21 t A Admk& 1w AV .6 TT E H_ A' L e1t4 4. F. 14e P vc F E-D WAY, WA H I JN&m G Tu'dgdkb' 'ImL s 0.5 /0 rook 6 7*0 5X15r1A16 IV076* NCAi?,65r Exl-5rwc-t srgucruivE 0. 4,e rYPE 54 5 10tWAL1< 4PPROXIMAreL�j 140NOr?rH R6-ma vz- Fgoposry .5rRacrVRE 6XI.5 r .5AN. .5. MIN CITY ENGINEER 5104EWALK 0 VERrL ow 46L. =-.149 6. 6 Z* 340 o /.c. 379.41 o AV Bor .7,60.6 6 4EX /s rIN6 f46 CUR8 CUT rO S6 IN 1111,08 limb 94rP4 A C COw / r1-1 Fv 4 L 14,rlaHr 00 mum mom* 00400_ 0 LA/VDSCAP poll LA. 0490. 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I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MEN== - - ------ - SHEET NO* REV. No. DATE DESCRIPTION 0 lbo, wco Sc H. 111 0%01 Fort 'uo"TZ OFFICE B 610' DING 'N ALE ev, 1 5' S4w 40� a Al' sot& L) H E 6`1 4 �'j 4 AVE, SW or a -A 11mvesia 0 --m 9% 1 a.. 3, .1 IN MmOmmmomm Y U N'm 'm pumm OwAft "'AM"U' DRIVE 0 5 3 U RV E' d 1 DATI" 11 Auy. t:lf CHECKED RAb 44A u F u N(3 P BOX 1031 PUYALIMP WA. 98371 E'E'AL WAY, WA PAVI k.A DH/N Au JOB 9-246-94- Y ALLU P 845-8833 APPROVED' SEATTLE 838-3474 Z) N�j 5 CRB Te I ow% UA%*& boft 5 0i. 020 #6 " I` L WAY H I OL of Acm T* OF FEDERA DRAWN: JHD CIT" WAO"' K BUT r F1 E tj LDIN 7 4? 4? 94 , / KUKER-RANKEN, INC. KUKER-RANKEN. INC. "�'�Is +q"clfw'?iVML?�bZi�kc��+'d►'�P�Oh71M1�6t�'t'�ih-'��+�?-st'Jv"ti�?K►`iL. +c+ttitX.r,.'t'Si4�ttbf: ` 1 ,^ 0 Or aegillLrllM,*I�•rvK:dD.d1"'ir3�-'.r'e�?ffy"tiiFTArt'v.Q;:t7..at"K;.''?';?'ScIK:IT Ttde Size {m.) 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LA-YOUr FLAK s}}A_L t5I= M0\AP'r--t2 8Y T M— r.tA�� itv 0�,rMOvvM7 1W TEE: c:tTY 43) 4 GTALI-AX109 CX-- s"rR 't LIGIA7S 6i} A L C01AV:0rU4 TO C1T�C sTANoA.�fl L7�T,�ILS Ata�v sP>~ci��cp.T�a1�s. s�� -T}{� i7�STbti4�GE. �' N[A`C �� bl✓�f��SCQ TC3 AC�Ot-�IDPAT'� F'RGQ 4Z t-O.ATIoA4 OF CLiL-QE-SAG �.� C iT1l�G log GMLL- 7 01-e Tk1E c1w VtUwtgElerl As -ttAir s MVL ,Tlm uIAIMWTS CITY OF Fsz)s2ZPL_ wz � was �N- � N ST2.�ET u CST 7 PEGJ yN P TO MEET y-OA V Wo&Y ENGINEER, i 1DATS CITY OF � �� 33530 1 ST WAY SOUTH • FEDERAL WAY, WASHINGTON 98003 May 23, 1994 Mr. Dick Tydings Interwest Development NW, Inc. 1425 - 22nd Street NW, Suite E Auburn, WA 98001 RE: SPR94-0006 - BUTZ OFFICE BUILDING 35406 21ST AVE SW, FEDERAL WAY, WA Dear Mr. Tydings: The city's Community Development Review Committee (DRC) has completed an initial technical review of the above referenced proposal. Following is a list of requirements relative to site plan requirements, landscape plan design, and construction elements applicable to your project. Planning Department: Contact Deb Barker at 661-4103 1. Site Plan Approval Requirements: a. Drawing requirements must be provided as noted below: 1. The square footage of the site needs to be shown. 2. Complete dimensions of parking stalls and drive aisles must be provided along with any driveway within 150 feet of the site. 3. Site coverage of structures, total impervious area, and landscape area, expressed as a percentage of the site, must be provided. 4. Pursuant to Federal Way City Code (FWCC 22-1445), sidewalks along the building shall be a minimum of five feet in width. Pedestrian access connecting the abutting street to interior sidewalks must also be provided. 5. Distances between the proposed structure and existing off site structures within 150 feet must be provided. 6. Existing and proposed easements must be shown. 7. The site plan and the floor plan do not reflect the same building footprint. The floor plan has a 5' x 8' mechanical room on the north side of the building. This has not been depicted on the site plan; north of the building is a future building pad. This discrepancy must be resolved. Mr. Dick Tydings May 23, 1994 Page 2 2. Landscaping: a. An approved landscape plan is required prior to final site plan approval. While the submitted landscape plan meets the general intent of the perimeter landscape code requirements, there are several features that must be amended as follows: 1. Significant trees - Pursuant to FWCC section 22-1568(c)(2) a and b, the applicant shall submit a tree retention plan concurrent with the first permit application for the development. The plan shall include a tree survey or cluster survey which identifies significant trees and a plan for retention, removal transplanting, or replacement of significant trees. The percentages retained or replaced trees shall also be identified. 2. Interior lot landscaping - Pursuant to FWCC section 22-1567(b)(1)(a)(i), twenty square feet of interior parking lot landscaping shall be provided for 40 parking stalls or less. The proposal includes 13 parking stalls which requires 260 square feet of interior lot landscaping. The submitted plans do not contain any of the required interior parking lot landscaping. Pursuant to FWCC 22-1567 (c), landscape islands shall be provided at the end of all rows of parking, for separation buffering between loading doors or maneuvering areas, and parking areas or stalls, and dispersed throughout the interior parking area in a manner to reduce visual impact of the parking lot. Interior lot landscape islands shall be a minimum of 64 square feet, and a minimum width of six feet at the narrowest point for islands at the end of 90 degree parking rows. Type IV landscaping shall be provided in the interior lot islands. 3. Street Trees - Street trees, per FWCC section 22-1525, have not been shown as part of the proposal on the landscape plan. 4. Parking Area/Screening for Rights -of -Way - Parking areas adjacent to the public right-of-way shall be screened pursuant to FWCC section 22-1567 (e). The proposed screening method has not been identified. 5. Foundation Landscaping - Pursuant to FWCC section 22-1564(v), foundation landscaping is encouraged for all development to reduce the scale, bulk, and height of structures. 6. FWCC Section 22-1570 provides for flexibility within landscape designs. The Director of Community Development has authority to modify specific requirements or impose additional requirements in unique or special landscape circumstances to assure stated purpose of the section is met. The applicant may request a modification of landscape requirements. A modification may be granted subject to Mr. Dick Tydings May 23, 1994 Page 3 the criteria listed in FWCC section 22-1570(b) through (i). Landscape modification requests may precede landscape resubmittals. Any modification request should be directed to my attention. 3. Garbage/Recycling Facilities: a. Pursuant to FWCC section 22-949, storage areas for garbage and recycling receptacles for material generated on the site shall be incorporated into the designs for commercial buildings. This project is not exempt from the requirements of this section and garbage/recycling facilities that meet code requirements must be provided. 4. Other Requirements: a. A sign permit application is enclosed. The sign category for this site is D. Any questions about sign requirements should be directed to Richard Cottage, Sign Code Compliance Officer, at 661-4017. b. Site improvement bonds are required prior to issuance of the building permit. Associated maintenance bofids will be required prior to acceptance of construction and issuance of a Certificate of Occupancy. Enclosed is a bond quantities price schedule and worksheet for your convenience. c. Cumulative Development Requirements - Upon completion of the proposed office building, this site will contain more than 10,000 square feet of undeveloped land. The applicant should be advised that subsequent development may require environmental review pursuant to FWCC Chapter 18, Environmental Protection. Cumulative impacts to the entire site will be analyzed. Public Works: Contact Skip Tullock at 661-4132 Public Works review of the proposed office building has begun. The following information needs to be provided: 1. The existing contours as well as the proposed grades need to be based on KCAS or NGVD- 29 datum with the benchmark shown. 2. The width of 21st Avenue Southwest needs to be depicted. 3. It appears that the proposed biofiltration Swale will need to be relocated since it will interfere with any future extension of the sewer main located on the north side of the Mr. Dick Tydings May 23, 1994 Page 4 property. In addition, an access road will need to be provided adjacent to the north half of the swale. 4. A standard drive approach needs to be provided in lieu of the existing curb cut shown on the drawings-. This should be a maximum of 30 feet in width. 5. The oil/water separation structure needs to be installed upstream of the biofiltration swale. 6. Public Works December 16, 1993, pre -application comment #5 is still applicable: "Since the proposed building site is large enough to be subdivided, the following items should be addressed: 1. The site's drive approach location as it relates to future public roads or on -site driveways. 2. The use of a joint drive approach as a way of limiting curb cuts. 3. Providing future connections between parking lots of adjacent properties to eliminate ingress and egress (from these properties) to 21st Avenue SW." Federal Way Water and Sewer: Contact Rick Gilmore at 941-2288 1. Water: As stated in the December 16, 1993, pre -application response, water is available by direct connection within 21st Avenue Southwest. Developer extension permits are required. 2. The sewers are located adjacent to the north property line of the proposed development. The developer shall extend these sewer facilities to the southern property line of the development as a conditions of sewer connection. The sewer extension easement must be 15 feet wide and set 10 feet from the building for construction clearance. This easement must be depicted on the site plan. 3. The bioswale should not be placed in the sewer easement. King County Fire District, #39: Contact Chris Ingham at 946-7242 The enclosed memorandum dated December 2, 1993, from Pat Kettenring to Lori Schill, still applies to this project. Mr. Dick Tydings May 23, 1994 Page 5 Building Division: Contact K.C. Ellis at 661-4123 Requirements for the building permit application have been listed on the enclosed Building Section Pre -development Information Checklist dated April 27, 1994. To assure that your permit proceeds in a timely manner, it is in your best interest to submit a complete package of any required additional information as soon as possible. Permits requiring additional information or resubmittals are generally handled on a first comelfirst serve basis. The longer time it takes to receive required resubmittals,.the greater the potential for other projects to be processed before yours. Please contact me, or another appropriate staff person, if you have any questions at this time. Since. , Deb Barker Associate Planner enc: FWCC Article Maintenance Quantities Sign Permit Application FWCC 22-949 FWCC 22-1445 Public Works Pre -Application Memorandum Fire District Pre -Application Memorandum Building Division Checklist c: Skip Tullock, Engineering Plans Reviewer K.C. Ellis, Lead Plans Examiner Richard Cottage, Code Compliance Officer Chris Ingham, Federal Way Fire District #39 Rick Gilmore, Federal Way Water & Sewer District 5P'UW=Pr2.Itr 20 8/10/94 Bennett PS & E RON BUTZ COMMERCIAL SITE 94-3543 CITY OF FEDERAL WAY BASIN SUMMARY BASIN ID: 2D SBUH METHODOLOGY TOTAL AREA.......: RAINFALL TYPE....: PRECIPITATION....: TIME INTERVAL....: TIME OF CONC...... ABSTRACTION COEFF: NAME: 2 YEAR DEVELOPED CONDITION 0.40 Acres BASEFLOWS: 0.00 cfs TYPElA PERVIOUS AREA 2.13 inches AREA..: 0.07 Acres 10.00.-min CN..... 86.00 3:.48 min IMPERVIOUS AREA 0.20- --- AREA..: 0.33 Acres TcReach - Sheet L: 110.00 TcReach - Channel 107.00 TcReach - Chalinel L • 1 .00 PEAK RATE: 0.16 cfs L: CN..... 98.00 ns:0.0110 p2yr: 2.13 s:0.0100 kc:42.00 s:0.0040 kc:17.00 s:0.0200 0.06 Ac-ft TIME: 470 min BASIN ID: 2E NAME: 2 YEAR EXISTING CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPElA PERVIOUS AREA PRECIPITATION....: 2.13 inches AREA..: 0.40 Acres TIME INTERVAL....: --- min ~44.15 CN....: 81.00 mini TIME OF CONC.....(: IMPERVIOUS AREA ABSTRACTION COEFF: AREA..: 0.00 Acres CN..... 98.00 TcReach - Sheet- 1135.00 ns:0.8000 p2yr: 2.13 s:0.0400 PEAK RATE: 0.03 cfs VOL: 0.02 Ac-ft TIME: 490 min BASIN ID: 20S SBUH METHODOLOGY TOTAL AREA.......: RAINFALL TYPE....: PRECIPITATION....: TIME INTERVAL....: TIME OF CONC.....: ABSTRACTION COEFF: NAME: 2 YEAR OFF -SITE 1.59 Acres BASEFLOWS: 0.00 cfs TYPElA PERVIOUS AREA 2.13 inches AREA..: 1.04 Acres 10.00 min CN..... 81.00 109.71 min IMPERVIOUS AREA 0.20 AREA..: 0.55 Acres TcReach - Sheet L: 300.00 TcReach - Sh vw-L59.,00 PEAK RATE: 7!0 12 cfs VO : CN..... 92.00 ns:0.8000 p2yr: 2.13 s:0.0270 ks:3.00 s:0.0270 0.12 Ac-ft TIME: 550 min page 4 4-1 w U C M Tine in Hours Hyd No. : 1 Rate: 0.16 cfs Time: 7.83 hr 2VOLr, Nkour S+111 Vol 0.06 Ac-ft Int: 10.00 min L) ,u&p&A Gu•�c�� Jh�� Hyd No.: 2 Rate : 0.03 cfs Time: 8.17 hr 2 qm,r Z4 you f' F1+�yn Vol : 0.02 Ac-ft Int: 10.00 min 015flrlo CvrtiA3� 7- 4 8/10/94 Bennett PS & E " page 3 RON BUTZ COMMERCIAL SITE 94-3543 CITY OF FEDERAL WAY BASIN SUMMARY BASIN ID: 25D NAME: 25 YEAR DEVELOPED CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPElA PERVIOUS AREA PRECIPITATION....: 3.43 inches AREA..: 0.07 Acres TIME INTERVAL....: 10.00 min CN....: 86.00 TIME OF CONC.....: 3.48 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.33 Acres CN..... 98.00 TcReach - Sheet L: 110.00 ns:0.0110 p2yr: 2.13 s:0.0100 TcReach - Channel L: 107.00 kc:42.00 s:0.0040 TcReach - Channel V!0.0.00 kc:17.00 s:0.0200 PEAR RATE �.27 cfs :VOL: 0.10 Ac-ft TIME: 470 min BASIN ID: 25E NAME: 25 YEAR EXISTING CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPElA PERVIOUS AREA PRECIPITATION....: 3.43 inches AREA..: 0.40 Acres TIME INTERVAL....: 10.00 min CN....: 81.00 TIME OF CONC.....: 44.15 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.00 Acres CN..... 98.00 TcReach - Sheet L: 135.00 ns:0.8000 p2yr: 2.13 s:0.0400 PEAR RATE: 0.08 cfs VOL: 0.05 Ac-ft TIME: 490 min BASIN ID: 250S NAME: 25 YEAR OFF -SITE SBUH METHODOLOGY TOTAL AREA.......: 1.59 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPElA PERVIOUS AREA PRECIPITATION....: 3.43 inches AREA..: 1.04 Acres TIME INTERVAL....: 10.00 min CN....: 81.00 TIME OF CONC.....: 109.71 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.55 Acres CN....: 92.00 TcReach - Sheet L: m 00 ns:0.8000 p2yr: 2.13 s:0.0270 TcReach - Shallow L: 350 60 ks:3.00 s:0.0270 PEAK RATE: 0.29 cfs VOL: 0.26 Ac-ft TIME: 540 min L J Hyd Hyd w u c No.: 3 Rate: 0.27 cfs Time: 7.83 hr Vol 0.10 Ac-ft Int: 10.00 min No.: 4 Rate: 0.08 cfs Time: 8.17 hr Vol : 0.05 Ac-ft Int: 10.00 min 2 24kucr y ,t,v—,s'Dl�h� 8/10/94 Bennett PS & E page 1 RON BUTZ COMMERCIAL -SITE 94-3543 CITY OF FEDERAL WAY BASIN SUMMARY BASIN ID: 100D NAME: 100 YEAR DEVELOPED CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPElA PERVIOUS AREA PRECIPITATION....: 4.32 inches AREA..: 0.07 Acres TIME INTERVAL....: min CN....: 86.00 TIME OF CONC.....: :3.48 min IMPERVIOUS AREA ABSTRACTION COEFF: 0-.2-0 AREA..: 0.33 Acres CN.....:�,98.00 TcReach - Sheet L: 110.00 ns:0.0110-p2yr:,2.13`s:0.0100 TcReach - Channel L• 107.00 kc:42.00 s:0.00,F0 TcReach - Channei L 110-- 00 kc:17.00 s:0.0200 PEAR RATE:.0.35 cfs VOL: 0.13 Ac-ft TIME: 470 min BASIN ID: 100E NAME: 100 YEAR EXISTING CONDITION SBUH METHODOLOGY TOTAL AREA.......: 0.40 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPElA PERVIOUS AREA PRECIPITATION....: 4.32 inches AREA..: 0.40 Acres TIME INTERVAL ....... __44, 0,mmin CN....: 81.00 TIME OF CONC.....Q 44.15 min IMPERVIOUS AREA ABSTRACTION COEFF: `0_lQ - AREA..: 0.00 Acres CN.... 98.00 TcReach - Sheet L:`OO ns:0.8000 p2yr: 2.13 s:0.0400 PEAR RATE � 0.13 cfs VOL: 0.08 Ac-ft TIME: 490 min BASIN ID: 1000S NAME: 100 YEAR OFF -SITE SBUH METHODOLOGY TOTAL AREA.......: 1.59 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE....: TYPElA PERVIOUS AREA PRECIPITATION....: 4.32 inches AREA..: 1.04 Acres TIME INTERVAL....: 10.00 min CN....: 81.00 TIME OF CONC.....: 109.71 min IMPERVIOUS AREA ABSTRACTION COEFF: 0.20 AREA..: 0.55 Acres CN....: 92.00 TcReach - Sheet L: 300.00 ns:0.8000 p2yr: 2.13 s:0.0270 TcReach - Shaillow L 15fl.00 ks:3.00 s:0.0270 PEAR RATE` 0.41 cfs VOL: 0.36 Ac-ft TIME: 540 min 1 E u c 91 Hyd No.: 5 Rate: Vol Hyd No.: 6 Rate: Vol • Tine in Hours 0.35 cfs Time: 7.83 hr 0.13 Ac-ft Int: 10.00 min 0.13 cfs Time: 8.17 hr 0.08 Ac-ft Int: 10.00 min l oc - 24 � Dj r stvtT%- I DDy far, 24 hater s' -'r► ex lSii nj OWY1 4ity) M �� V. CONVEYANCE SYSTEM ANALYSIS AND DESIGN On -site pipes are 1211, and are sufficient to convey the 25 year, 24 hour storm. See nomographs. Biofiltration swale sized to treat 2 year, 24 hour storm with 1 foot of freeboard, and convey 100 year, 24 hour storm without overtopping. See calculations. Cross pipe in 21st Ave. Sw will be flattened to a 0.5% slope and enlarged to 18" diameter to maintain approximately the same capacity. Existing storm system is 36" diameter, assume sufficient capacity. KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL FIGURE 4.3.4A NOMOGRAPH FOR SIZING CIRCULAR DRAINS FLOWING FULL 1000 900 800 .0001 700 Z 600 .0002 500 Minimum .0003 Allowable 400 •0004 .0001 1300 VelocityA .0005 (Flowing 0006 -- Full) 200 100 90 80 70 uj 60 U 50 z120 40 w 30 Q 2 U cn 10 9 8 7 6 5 4 3 2 quo 120 � • 0008 .0002 108 6 001� 0003 96 a .0004 90 c .002--j�.0005 4.0 84 ==--, 0006 78 O .003 0008 72 .004 001 66 w 5.0 60 54 p N .005 .006 O 008 .002 O qg 01 a �i w 6.0 .0 Lu = 42 7.0 Z 36 0 .005 O w a 006 LL ? 30 .008 a w 8.0 uj 04 010 O LL a 27 .05 U j Z 9.0 LL 24 8� .Q20 H 10.0 O 21 .10 UO cc w 030 18 .040 J Uj Q 15 .060 p .080 12 .100 10 SAMPLE USE 8 24" dia. CMP @ 2% slope yields 17cfs @ 5.2 FPS velocity (n = 0.024) 6 Values per Manning's Equation Q= ( 1.49) ARZ/�s 5 n o This table can be converted to other "n" values by applying formula: 01 = n1 02 n2 4.3A-18 Ii f) --7 , (' S S�� Ueh PeL r,�i1 11 1I90 944 43 gf9 I �K fii! ■ ta.� _� !Y, l Gf�? ram'- - r C = D. 9 D (pewemer* ar,d�- -Fr = Pe Lrt �2 2' ) Z: 1 3Z„ - .4 paakrevt- -sheer �b LF pcpe o. I V:7 � 210 a U ;,7 s 29 lL 4 S LZs = 2, && 680 2, to ( C S` °l a 3 = 1, 0 4"o Z= 2. I Z( 0 4!5 = D. 9 �zs 3•4 Z (0,&42-) " Z. 2O 25;7= p.Z0.40 0.-79 c Vu 30 • CRY OF 7 I S f ;W-_4 E�67z to 6 ' PU 3LIC WORKS DEPARTMENT BIOSWALE CALCULATION WORKSHEET Project Name: F yi r [�A%.ate: lcl Project No.: `"{ BY: 1. 2 yr.124 hr 2. 25 yr./24 hr. 3. 100 yr./24 hr. Existing Q= (- c l Developed Q = Developed Q = e cfs Note: Use developed Q if R/D is downstream of bioswale or BIOFUNCTION DESIGN 4. Select design flow depth/vegetation type: 79 (See note) A. Urban (Lawn) 1" Design depth = 0.08' 0-S e- 2 " B. Rural (Natural) 4" Design depth = 0.33' C. Wetland (Wet areas) 8" Design depth = 0.67' (Recommended: 0.08' or 0.33'] 5. Calculate swale Q and V given: N = 0.1 S = 0.02 ft/ft Side slopes = 3:1 (H: V) d = 0.08', 0.33' or 0.67' (per item 4, above) b = make an initial assumption. Q = a. 3 4" cfs V = D 563 fps b. l to D, � q- Calculated Q must be >_ item 1 Q. Calculated V must be <_ 1.5 fps. devrev\biowrksh Revised: 2122/94 1 proposed. Design depth= 0. 1 101 ft. b= EQUIVALENT AREA 6. if the proposed bioswale is less than 200 lineal feet in length, it may be shortened. The minimum length is 50 feet. The minimum length of any segment is 50' . Biofunction area (sq. ft.) = 200 ft. x wetted perimeter 200 ft. x 4 0ft. — 10 sq. ft. Equivalent wetted perimeter = biofunction area+proposed length A l () 4 i 100 ft = '9, ! ft. .'. b = (00 ACTUAL BIOSWALE CAPACITY AND VELOCITY FOR 2 YR. EVENT 7.a. Calculate Swale Q given: N = 0.1 S = Actual (0.005 to 0.06 ft./ft.) [Recommended: 0.02-0.04 ft./ft.] Side slopes = 3:1 (H:V) _ �z d= C. 1 C a ` 1 d =per item 4 to � b = per item 5 or 6 [Recommended: 2' min., S' max.] b= —7 ft. VUP , � Q = (�, 319 cfs > D . 3 0, 1 !.0S Calculated Swale Q must be >_ item 1 Q. 7.b. Calculate Swale V given: S = per item 7.a. Side slopes = 3:1 (H: V) Q = per item 1 b = per item 5 or 6 V= DZ7 fps 0,11 Calculated V must be <_ 1.5 fps. Travel time = length of swale/V x 60 100 ft. l D 2 `7 fps x 60 sec/min = [Recommended: 9 minutes, 5 minutes minimum] devmv\biowrhh Revised: 2=94 2 S = �. 0 �� ft/ft. Q= 0 3 4 cfs. b= �' 0 -� 6. %.5 min. 3Z FREEBOARD ' FOR 25 -. EVENT 8. Calculate actual flow depth for 25 yr. event. N = 0.027 S = Actual Side slopes = Actual (H: V) b = Actual Q = per item 2. S= Q.ODS ft./ft. J H 11V b = 7 ft. 3 Q=D 7 0l cfs depth required 6-7 ft. depth provided = ft. o freeboard= ft. Top of swale must be >_ 6" above 25 yr. water surface elevation. FREEBOARD AND VELOCITY FOR 100 YR. EVENT 9. Calculate actual flow depth and velocity for 100 yr event. N = 0.027 S = Actual Side slopes = Actual (H: V) 3 H : 1 V b= per item 5 or 6 b= ft. 3 Q = per item 3. 0" 2 Q = � & 0 -cfs. depth required = -Q- / 6 - ft. depth provided = 1 la 7 ft. freeboard = n , ft. o �iE I cl�p2t = O, , to � = 8 Top of swale must be at or above 100 yr. water surface elevation. V fps 0"I � - wp -:- K = 0, to73 Calculated V must be 5 5 fps. r 0UU� U�, I I VAIN 0A� �l 1�12 �(I►f J 3 " FREEBOARD 1 i' 2•• ;r J B14F1LTRATION SWALE X-§EC.- JCALE: V w 2' 5 l 3Z-f VI. SPECIAL REPORTS AND STUDIES N/A OWE VII. BASIN AND COMMUNITY PLANNING AREAS N/A VIII. OTHER PERMITS N/A s IX. EROSION/SEDIMENTATION CONTROL DESIGN JQ Erosion and Sedimentation Control devices: A temporary sediment trap and interceptor Swale will collect runoff from the site during construction and convey it to the existing storm system in 21st Ave. SW. Other measures to be utilized are silt fence, temporary construction entrance, revegetation of disturbed areas as soon as is practical, and construction sequence indicating timing of construction and placement of temporary erosion and sedimentation control measures. -�-- IC WORKS PUBL DEPARTMENT SEDWENT TRAP CALCULATION WORKSHEET Project Name: 2nLbLA f Date: Project No.: p — OZ By: Variables: A area of homogenous/uniform area in acres ASED annual sediment yeild in tons per acre CV cover factor, use 1.0 which represents no ground cover during the construction process I,SED total annual sediment load VsED sediment storage volume R rainfall erosion index, for Federal Way use 11.63 K soil erodibility factor LS length -slope factor; from Table 5.4.4B (note, lengths measured are horizontal distance from plan view) PR erosion control practice factor; use 1.3 which represents compacted and smooth slopes. P"9 1. Divide the site into areas of homogeneous SCS soil type, uniform slope and length. 2. Determine the LS value for each uniform area (see table 5.4.4B) Slope = 4 % Slope = % Slope = devrev\biowrtsh Revised: 5/3/94 1 10, 5 LSl Y `� LSZ = LS3 — r. 3. Calculate the annual sediment yeild (AS.) in tons/acre for each homogenenous/uniform area. ASan = A*R*K*IS*CV*PR (for Federal Way AsED= 15.12*A*K*LS) given: A = o , 40 ac. K = 0, 15- LS = n, 9"5- ASS = o , 4 oO tons 4. Summation of the LSED to the trap. L.. _ ,(Mons 5. Calculate the Vsm by dividing Ism by Pj. Vsw = L� 10.05 tons/cf VSm _ IRJy_cf Zr 3 a devrev\biowriah Revised: 5/3/94 2 \144 I 2 °� IL 3 o.5, +1 X. BOND QUANTITIES WORKSHEET, RETENTION/DETENTION FACILITY SUMMARY SHEET AND SKETCH, AND DECLARATION OF COVENANT 4-2 King County Building and Land "Development Division COMMERCIAL/MULTIFAMILY GROUP 1 Date: 8/22/94 I BALD Project No.: Project Name: Ron Butz Off ice Buildin I site Address: 35406 21 s t Ave. SW BOND QUANTITIft WORRSHEET Page 1 of 2 Fill in those items which pertain to this project and return to the Commercial/Multifamily Group - Site Development Review Unit. PUBLIC ROADWAY IMPROVEMENTS I PRIVATE ON -SITE IMPROVEMENTS ] Unit Price Unit Quantity Price I Quantity Price A.C.Pavement . . . . . . . . . . S 8.00 SY I S { 1015 SY $8. 120 • TO Cement Conc. Curb 8 Gutter . . . 9.00 LF ] S I S Extruded Asphalt Curb 2.50 LF S n $ Concrete Sidewalk . . . . . . . 9.00 LF 125 LF sl,125 . 0`Y S I 6" pipe . . . . . . . . . . . . 7.50 LF S I $ „ pipe 8 i . . . . . . . . . . . . 10.00 LF S 1 -� S $ -fig . 0 12" pipe . . . . . . . . . . . . 15.00 LF I S I 15" pipe . . . . . . . . . . . . 16.00 LF I S + S I S I 18" pipe . . . . . . . . . . . . 20.00 LF ] S .O� 24" pipe . . . . . . . . . . . . 26.00 LF I S [ S I - 36" pipe . . . . . . . . . . . . 30.00 LF 1 S [ S I 4 4841 pipe . . . . . . . . . . . 50.00 LF I S I S I -- 60" pipe . . . . . . . . . . . . 65.00 LF I S I S I 72" pipe . . . . . . . . . . . . 80.00 LF I S I S I Curb Inlet . . . . . . . . . . . 500.00 EA. I S [ 3 EA S s2250 . YU CB TYPE I a I-L . . . . . . . . 750.00 EA. I S I CS TYPE II - 48" . . . . . . . . 1400.00 EA. I S I 1 EA EA S 1 400. Q0 TO CB TYPE II - 54" . . . . . . . 2100.00 EA. I S I S�. C8 TYPE II - 72" . . . . . . . . 3400.00 EA. I $ I S I CS TYPE II - 96" . . . . . . . . 4000',00 EA. I S I 1 EA S I S 450.T0 Restrictor/Separator 12" .... 450.00 EA. I $ 1 Restrictor/Separator 15" . . . . 500.00 EA. S I S I Restrictor/Separator 18" . . . . 600.00 EA. I S I S I Restrictor/Separator 24" . . . . 750.00 EA. I S I S`�: I Fencing (around pond) . . . . . 10.00 LF I S I S Ripray . . . . . . . . . . . . . 30.00 CY I $ 1 560 SF_ S 3,920 . Q0 Rockery, Gabion 8 ecology wall . 7.00 SF I S I S I Concrete Retaining Wall . . . . 8.00 SF 1 S 1 S [ Excavation for Pond . . . . . . 5.00 CY 1 $ Infiltration Trench . . . . . . 15.00 LF I S Flow Spreader . . _ _ . _ . . . 15.00 LF I S I S I Trench Drain . . . . . . . . . . 15.00 LF [ S [ S Trash Rack . . . . . . . . . . . 100.00 EA. I S [ S I Detention Pipe Riser . . . . . . 400.00 EA. 1 S I S I I S I $ I - l S I 1 [ S I I [ SUBTOTAL $1 , 9 6 5 .0 SUBTOTAL s 21,825.10 I I [ 1/90 43 BOND QUANTITIES WORRSBEET King County Building and Land Development Division Commercial/Multifamily Group Unit Price Unit Silt Fence . . . . . . . . . . . S 3.00 LF Seeding/Mulch . . . . . . . . . 3000.00 ACRE Temporary Pond . . . . . . . . . 5.00 CY Standpipe . . . . . . . . . . . 200.00 EA. CB Interim Protection . . . . . 25.00 EA. Quarry Spell/Rip-rap . . . . . . 30.00 CY Rock Construction Entrance _ . . 300.00 EA. Pipe (12 inch dia.) . . . _ . . 15.00 LF EROSION/SEDIMENTATION 1 CONTROL FACILITIES 1 Quantity Price 1 1 240 LF = 720.001 � 1 S-300.0 0 1 1 cy :6 '- . 00 1.3 EA' I EA' S--TOT.-Do 1 1 54 LF S 8I0.001 I S 1 I x 1 I 1 SUBTOTAL S2 , 290 . 00 f I 1 page 2 of 2 1 Signature: I Telephone No.. 1 �(206) 838-3474 1 Firm Nam: Bennett PS&E 1 The following information will be completed by the King County Site Development Review Unit. PUBLIC ROADWAY IMPROVEMENTS: S 1,965.00 PRIVATE ON -SITE IMPROVEMENTS: S 21,825.00 EROSION/SEDIMENTATION CONTROL $ 2,290.00 SUBTOTAL : 20% CONTINGENCY : S 26,080.00 t 5,216.00 TOTAL BOND AMOUNT s 31 2 9 6.0 01 e � RIGHT—OF—WAY BOND : #B:BONDSHEE.WPF 11/25/1989 t c ornroF ,C., l � IL�Z7 BOND QUANTITIES PRICE SCHEDULE The unit prices shown on this schedule are recommended minimum prices consultants shall follow when completing the BOND QUANTITIES WORKSHEET for engineering plan submittals. Unit prices may not deviate from this schedule unless prior approval is obtained from toe Der!-3rtment of Public Works. UNIT UNIT PRICE UNITS PRICE UNITS ROAD CONSTRUCTION MISCELLANEOUS k Clearing & Grubbing ---- LS ■ Rip Rap Outfall Protection 17.00 CY ■ Excavation & Embankment 7.00 CY N Access Road/Bollards 500.00 LS • AC Pavement & Rock Base 10.00 SY ■ Fencing (around pond) 10.00 LF • Cement Conc. Curb/Gutter 9.00 LF ■ Infiltration Trench w/12" Perf PPG 18.00 LF ■ Extruded Asphalt Curb 4.00 LF 0 Flow Spreader/Dispersion Trench 20.00 LF ■ Concrete Sidewalk 9.00 LF ■ Trash Racks 200.00 ea. a Bi.-filtration Swale 6000.00 ea. DRAINAGE PIPE ' ■ 6" Pipe 7.50 LF RET `.INING WALLS & S-MUCTURES 9 8" Pipe 10.00 -r ■.-P_ +aining Walls 8.00 SF ■ 12" Pipe 15.00 LF ■ Bic;iges ---- .. N 18" Pipe 20.00 LF ■ Rockery Facia Walls 7.00 SF N 24" Pipe 26.00 LF ■ 36" Pipe 40.00 LF TRAFFIC CHANNELIZATION ■ 48" Pipe 50.00 LF ■ Signalization --- LS r 54" Pipe 60.00 LF R Channelization ---- LS N 60" Pipe 65.00 LF ■ 72" Pipe 80.00 LF SITE STABILIZATION/EROSION CONTROL a Rock Construction Entrance 300.00 ea. CATCH BASINS ■ Seeding/Mulch 3000.00 Acre • Inlet & Grate 500.00 ea. ■ Silt Fence 4.00 LF ■ CB Type I & Grate 750.00 ea. 0 Netting Jute Mesh 5.00 SY • CB Type II 48" & Grate 1400.00 ea. a Sediment Pond Standpipe 200.00 ea. ■ CB Type 11 54" & Grate 2100.00 ea. E Sensitive Area Fencing 3.00 LF • CB Type II 72" & Grate 3400.00 ea. ■ CB Type II 96" & Grate 4000.00 ea. SURVEYING Monument in Case 500.00 ea. RETENTION/DETENTION CONTROL ■ Pond Excavation & Spillway 7.00 CY n Restrictor/Separator 12" 450.00 ea. ■ Restrictor/Separator 15" 500.00 ea. w Restrictor/Separator 18" 600.00 ea. ■ Restrictor/Separator 24" 750.00 ea. z Vaults - 12' span 20.00 CF ■ Vaults - 20' span 18.00 CF w Gravel Access Road 10.00 LF PW0591 (Rev 81931 "130ND{ QUANTITIES WOE--- SHEET 2 EROSION/SEDIMENTATION CONTROL FACILITIES UNIT PRICE UNIT QUANTITY PRICE Silt Fence 4.00 LF $ Seeding/Mulch 3000.00 Acre Temporary Pond 5.00 Cy $ Standpipe 200.00 Ea. $ CS Interim Protection 25.00 Ea. $ Quarry Spall/Rip Rap 17.00 Cy $ $ Rock Construction Entrance 300.00 Ea. Pipe (_'diameter) LF $ $ $ $ SUBTOTAL $ The following information will be completed by the City of Federal Way Department of Public Works: Public Roadway Improvements $ Private On -site Improvements $ Erosion/Sedimentation Control $ SUBTOTAL $ CONTINGENCY (20%) $ TOTAL BOND AMOUNT $ v BOND QUANTITIES WORKSHEET DATE: I PROJECT NO: PROJECT NAME: SITE ADDRESS: Fill in those items which pertain to this project and return to the Department of Public Works. PUBLIC ROADWAY PRIVATE ON -SITE IMPROVEMENTS IMPROVEMENTS Clearing & Grubbing LS $ S Excavation & Embankment 7.00 CY $ $ A.C. Pavement 10.00 Sy $ g Cement Conc. Curb & Gutter 9.00 LF $ $ Extruded Asphalt Curb 4.00 LF $ $ Concrete Sidewalk 9.00 LF $ $ 6" Pipe 7.50 LF $ $ 8" Pipe 10.00 LF $ $ 12" Pipe 15.00 LF $ S 15" Pipe 16.00 LF $ $ 18" Pipe 20.00 LF $ $ 24" Pipe 26.00 LF $ $ 36" Pipe 40.00 LF $ $ 48" Pipe 50.00 LF $ $ 60" Pipe 65.00 LF $ $ 72" Pipe 80.00 LF $ S Curb Inlet 500.00 Ea. $ $ CB Type I & IL 750.00 Ea. $ $ CB Type 11 - 48" 1400.00 Ea. $ $ CB Type 11 - 54" 21002'3 Ea. $ $ CB Type II - 72" 3400.00 Ea. s S CB Type 11 - 96" 4000.00 Ea. $ g Detention Pipe Riser 400.00 Ea. $ $ Restrictor/Separator - 12" 450.00 Ea. $ $ Restrictor/Separator- 15" 500.00 Ea. $ $ Restrictor/Separator - 18" 600.00 Ea. $ $ Restrictor/Separator - 24" 750.00 Ea. $ $ Fencing (around pond) 10.00 LF $ 5 Riprap 17.00 CY $ $ Rockery, Gabion & Ecology Wall 7.00 SF $ $ Concrete Retaining Wall 8.00 SF $ $ Excavation for Pond 7.00 CY $ $ Infiltration Trench 18.00 LF $ $ Flow Spreader/Dispersion Trench 20.00 LF $ $ Trash Rack 200.00 Ea. $ $ Biofiltration Swale 6000.00 Ea. $ $ S S S S S S SUBTOTAL S SUBTOTAL $ PW1292 (Rev 8/93) 1 XI. MAINTENANCE MANUAL N�LiAT -F0 1-F2 � � z- 5 GLu"a�r� �] C/tr cll �(29 �f�, K$I,NG COUNTY, WASh_NGTON, SURFACE WATEh .DESIGN MAMMAL.. NO. 4 - CONTROL STRUCTURE/FLOW RESTRICTOR Maintenance Component General Cleanout Gate Orifice Plate Overflow Pipe Manhole Catch Basin Defect Trash and Debris (includes Sediment) Structural Damage Damaged or Missing Damaged or Missing Obstructions Obstructions Conditions When Maintenance Is Needed Distance between debris build-up and bottom of orifice plate is less than 1-1/2 feet. Structure is not securely attached to manhole wail and outlet pipe structure should support at least 1,000 pounds of up or down pressure. Structure is not in upright position (allow up to 10% from plumb). Connections to outlet pipe are not watertight and show signs of rust. Any holes — other than designed holes — in the structure. Cleanout gate is not watertight or is missing. Gate cannot be moved up and down by one maintenance person. Chain leading to gate is missing or damaged. Gate is rusted over 50% of its surface area. Control device is not working property due to missing, out of place, or bent orifice plate. Any trash, debris, sediment, or vegetation blocking the plate. Any trash or debris blocking (or having the potential of blocking) the overBow pipe. See "Closed Detention Systems' Standard No. 3. See "Catch Basins' Standard No. 5. Results EXP--led When Maintenance la Performed All trash and debris removed. Structure securely attached to wall and outlet pipe. Structure in correct position. Connections to outlet pipe are watertight; structure repaired or replaced and works as designed. Structure has no holes other than designed holes. Gate is watertight and works as designed. Gate moves up and down easily and is watertight. Chain is in place and works as designed. Gate is repaired or replaced to meet design standards. Plate is in place and works as designed. plate is free of all obstructions and works as designed. Pipe is free of all obstructions and works as designed. See 'Closed Detention Systems' Standard No. 3. See "Catch Basins' Standard No. 5. C A-4 im Bennett- Pil'&E 1N0.0;i��'iUI �L py rt�LIV 1111 ��u�:l Li�i61[ETT �� TMLIVITTU L Surveyors and Engineers i P.O. Box 1031 720 East Main Puyallup, WA 98371 /A Puyallup 845-8833 Seattle 838-3474 FAX (206) 841-1734 �ede�lrt TO f L O DATE /) ,^ /�. a � JOB NOW -3 5743 ATTENTION cy(] RE: GENTLEMEN: WE ARE SENDING -YOU l.�Attached ❑ Under separate cover via A)jGt4 5Ilitt items: ❑ Shop drawings ❑ Prints ❑ Plans ❑ Samples ❑ Specification CITY OF r EE)EIR v'iw ❑ Copy of letter ❑ Change order _e " PUBLIC THESE ARE TRANSMITTED as checked below. For approval ❑ Approved as submitted '❑ For your use ❑ Approved as noted ❑ As requested ❑ Returned for corrections ❑ For review and comment ❑ — ❑ FOR BIDS DUE 19 REMARKS ❑ Resubmit copies for approval ❑ Submit copies for distribution ❑ Return corrected prints ❑ PRINTS RETURNED AFTER LOAN TO US COPY TO _ - SIGNED: ,�,Q_ _ A /00 L King County Building and Land'Development Division COMMERCIAL/MULTIFAMILY GROUP 4L BOND QUANTITIIS WORR3HEET Page 1 of 2 Date: 8�22�94 I BALD Project No.: 1 i I Project Name: Ron Butz Office Buildin I Site Address: 35406 21 s t Ave. SW Fill in those items which pertain to this project and return to the Commercial/Multifamily Group - Site Development Review Unit. [ PUBLIC ROADWAY IMPROVEMENTS I PRIVATE ON -SITE IMPROVEMENTS Unit Price Unit [ Quantity Price I Quantity Price [ A.C.Pavement ........ . . S 8.00 SY I s [ 1015 • SY S 8 ,120 . �O Cement Cont. Curb 8 Gutter . . . 9.00 LF I S [ 5 Extruded Asphalt Curb . . . . . 2.50 LF I S [ 5 Concrete Sidewalk ..... . . 9.00 LF [ 125 LF sl ,125 . OQ S I 6" pipe . . . . . . . . . . . . 7.50 LF [ S I S 8" pipe . . . . . 10.00 LF [ S I S 12" pipe . . . . . . . . . . . . 15.00 LF I S I �r 5 0 15" pipe . . . . . . . . . . . . 16.00 LF I S I s [ Is,, pipe . . . . . . . . . . . . 20.00 LF I � S8�b S I 24" pipe . . . . . . . . . . . . 26.00 LF I S I s I 36" pipe . . . . . . . . . . . . 30.00 LF I $ I S I 48" pipe . . . . . . . . . . . 50.00 LF I S [ $ I - 60" pipe . . . . . . . . . . . . 65.00 LF I $ [ S [ 72" pipe . . . . . . . . . . . . 80.00 LF f S [ S I Curb Inlet . . . . . . . . . . . 500.00 EA. I S I S n CS TYPE I I-L . . . . . . . . 750.00 EA. I S I 3 EA s 2, 250 TO CB TYPE 11 - 48" . . . . . . . . 1400.00 EA. I S I 1 EA s-1I4-00O . QO CS TYPE II - 54" . . . . . . . 2100.00 EA. I S I �EA s()' yo CB TYPE 11 - 72" . . . . . . . . 3400.00 EA. S I S I CB TYPE II - 96" . . . ... . . . 4000.00 EA. ' S [ = I Restrictor/Separator 12" . . . . 450.00 EA. [ S [ 1 EA s 450. To Restrictor/Separator 15" . . . . 500.00 EA. [ S [ S I Restrictor/Separator 18" 600.00 EA. I $ I S [ Restrictor/Separator 24" . . . . 750.00 EA. I S I S [ Fencing (around pond) . . . . . 10.00 LF I S I s I Riprap ............ . 30.00 CY I S I 560 SF- sue. TO Rockery, Gabion a ecology wall . 7.00• SF j S I s I Concrete Retaining hall . . . . 8.00 SF S [ $ I Excavation for -Pond . . . . . . 5.00 CY I S I S I Infiltration Trench . . . . . 15.00 LF I S I s I Flow Spreader . . . . . . . . . 15.00 LF [ S [ S I Trench Drain . . . . . . . . . . 15.00 LF [, S [ S I Trash Rack . . . . . . . . . . . 100.00 EA. [ S [ S I Detention Pipe Riser . . . . . _ 400.00 EA. I S I s I s { s I [ S I s I I S I S [ 1 I I R , I SUBTOTAL $1, 9 6 5.0 SUBTOTAL s 21, 8 2 5. 0 1/90 ' cl ;� DATE: BOND QUANTITIES WORKSHEET PROJECT NO: PROJECT NAME: SITE ADDRESS: Fill in those items which pertain to this project and return to the Department of Public Works. PUBLIC ROADWAY PRIVATE ON -SITE IMPROVEMENTS IMPROVEMENTS UNIT PRICE UNIT Clearing & Grubbing LS Excavation & Embankment 7.00 CY A.C. Pavement 10.00 SY Cement Cone. Curb & Gutter 9.00 LF Extruded Asphalt Curb 4.00 LF Concrete Sidewalk ' 9.00 LF 6" Pipe 7.50 LF B" Pipe 10.00 LF 12" Pipe 15.00 LF 15" Pipe 16.00 LF 18" Pipe 20.00 LF 24" Pipe 26.00 LF 36" Pipe 40.00 LF 48" Pipe 50.00 LF 60" Pipe 65.00 LF 727 Pipe 80.00 LF Curb Inlet 500.00 Ea. CB Type 1 & IL 750.00 Ea: CS Type II - 48" 1400.00 Ea. CB Type 11- 54" 2100-nO Ea. CS Type II - 72" 3400.60 Ea. CB Type 11- 96" 4000.00 Ea. Detention Pipe Riser 400.00 Ea. Restrictor/Separator - 12" 450.00 Ea. Restrictor/Separator - 15" 500.00 Ea. Restrictor/Separator - 18" 600.00 Ea. Restrictor/Separator - 24" 750.00 Ea. Fencing (around pond) 10.00 LF Riprap 17.00 CY Rockery, Gabion & Ecology Wall 7.00 SF Concrete Retaining Wall 8.00 SF Excavation for Pond 7.00 CY Infiltration Trench 18.00 LF Flow Spreader/Dispersion Trench 20.00 LF Trash Rack 200.00 Ea. Biofiltration Swale 6000.00 Ea. QUANTITY PRICE QUANTITY PRICE S S S $ S S S S - S S s S S S $ $ S S S S S S S S S S S S S S S S s $ S S S S S S S S S S S S S S S S 5 S S S S S S S S S s S S S S S S S S S $ S S S S SUBTOTAL $ SUBTOTAL S PW1292 (Rev W931 $OND, i?UANTITIES WOR"SHEET EROSION/SEDIMENTATION CONTROL FACILITIES UNIT PRICE UNIT QUANTITY PRICE Silt Fence 4.00 LF Seeding/Mulch 3000.00 Acre $ Temporary Pond 5.00 CY $ Standpipe 200.00 Ea. $ CB Interim Protection 25.00 Ea. $ Quarry Spall/Rip Rap 17.00 CY $ Rock Construction Entrance 300.00 Ea. Pipe ( 'diameter) ---- LF S $ $ S _ S SUBTOTAL $ The following information wi//be completed by the City of Federal Way Department of public Works: Public Roadway Improvements $ Private On -site Improvements $ Erosion/Sedimentation Control $ SUBTOTAL $ CONTINGENCY (20%) $ TOTAL BOND AMOUNT $ K= s CF" OF BOND QUANTITIES PRICE SCHEDULE The unit prices shown on this schedule are recommended minimum prices consultants shall follow when completing the BOND QUANTITIES WORKSHEET for engineering plan submittals. Unit prices may not deviate from this schedule unless prior approval is obtained from Vie Der+-3rtment of Public Works. UNIT PRICE UNITS UNIT PRICE UNITS ROAD CONSTRUCTION MISCELLANEOUS K Clearing & Grubbing --- LS a Rip Rap Outfall Protection 17.00 CY K Excavation & Embankment 7.00 CY " Access Road/Bollards 500.00 LS K AC Pavement & Rock Base 10.00 SY m Fencing (around pond) 10.00 LF ■ Cement Conc. Curb/Gutter 9.00 LF K Infiltration Trench w/12" Perf PPG 18.00 LF K Extruded Asphalt Curb 4.00 LF K Flow Spreader/Dispersion Trench 20.00 LF • Concrete Sidewalk 9.00 LF K Trash Racks 200.00 ea. K Bi-filtration Swale 6000.00 ea. DRAINAGE PIPE - K 6" Pipe 7.50 LF RET ANING WALLS & STJIVCTURES K 8" Pipe 10.00 ter: ■= P.. +aining Walls 8.00 SF K 12" Pipe 15.00 LF 1[ Bi Ages -- K 18" Pipe 20.00 LF K Rockery Facia Walls 7.00 SF K 24" Pipe 26.00 LF R 36" Pipe 40.00 LF TRAFFIC CHANNELIZATION ■ 48" Pipe 50.00 LF K Signalization -- LS ■ 54" Pipe 60.00 LF * Channelization --- LS K 60" Pipe 65.00 LF K 72" Pipe 80.00 LF SITE STABILIZATION/EROSION CONTROL K Rock Construction Entrance 300.00 ea. CATCH BASINS K Seeding/Mulch 3000.00 Acre K Inlet & Grate 500.00 ea. K Silt Fence 4.00 LF K CB Type I & Grate 750.00 ea. K Netting Jute Mesh 5.00 SY K CB Type II 48" & Grate 1400.00 ea. N Sediment Pond Standpipe 200.00 ea. K CB Type 11 54" & Grate 2100.00 ea. K Sensitive Area Fencing 3.00 LF K CB Type II 72" & Grate 3400.00 ea. K CB Type II 96" & Grate 4000.00 ea. SURVEYING N Monument in Case 500.00 ea. RETENTION/DETENTION CONTROL K Pond Excavation & Spillway 7.00 CY w Restrictor/Separator 12" 450.00 ea. K Restrictor/Separator 15" 500.00 ea. K Restrictor/Separator 18" 600.00 ea. • Restrictor/Separator 24" 750.00 ea. r Vaults - 12' span 20.00 CF K Vaults - 20' span 18.00 CF K Gravel Access Road 10.00 LF PW0591 (Rev 81931 #PRE 93-0060 BUTZ OFFICE BUILDING 1911 SW Campus Drive #353 1920 SF Office Building - mixed office/retail 35,000 SF, 7 parking spaces zoning: PO north: RS 7.2 east: RS 7.2 south: PO west: BC Review process: site plan review SEPA: exempt e)l A 'ar" .,t,1/ 7!F-- Setbacks: 20' front yard (21st Ave SW), side yard: 5', rear yard: 10'. Parking required: 1:300=6.4; provided 7 uNL1755 7AIW-d /: Landscaping: 8' Us buffer required along 21st Ave SW, 10' req'd on north & east p/l, 5' req' d at south p/l. Issues/concerns 1. Clarify use/purpose of "shop/storage" 2. North setback must be adjusted from 5' to required 10' Us buffer. f"Vort: 3. What about the rest of property? Future development plans? Binding site plan? AJ SuS- 4. Conceptual landscape plan required w/formal application, prepared in accordance with Landscaping code. Approved landscape plan is a requirement of site plan approval. Must include street trees along 21st and required interior parking lot landscaping. 5. Site plan submitted with formal application must include all features required in site plan review handout, e.g. storm drainage facilities, dimensioned parking layout, distance between existing/proposed strucutres on and off site within 150' of proposed structures, including adjacent driveways, significant trees if any, etc. � �CL'S��It-t-� � (�) t_I l-��-K� � ED • � b.�L.-� 1 T� I��TC7�� a D�lt-]n'F'� S COMMUNITY DEVELOPMENT TECHNICAL REVIEW COMMITTEE AGENDA OF: December 16, 1993 ATTN: UFkk41GWA L-Mk AtCRPcC(.S01,1-<.C.�LL- FROM: Federal Way Water and Sewer SUBJECT: Agenda Item No. 1 - Butz Office Building Preapplication Meeting COMMENTS: Water: Water is available by direct connection within 21st Avenue Southwest right-of-way. If additional hydrants or fire protection facilities are required, a developer extension of our facilities will be necessary. Sewer: Sewers are located adjacent to north property line of the proposed development. The developer will be responsible for extending our facilities to the southern property line of the development as a condition of connection. General: The proposed development is positioned on the property in a manner that suggests there will be additional structures constructed on this parcel. If that is the current plan, we would strongly advise the developer to meet with the District to select a plan for installing water and sewer facilities at a location that will not jeopardize future development. By: Date: 3 4� 91 90 89 88 J, 87 z 8685' �o8a°• b��/ of Co.Qc% 5o h h � � ti by � oypO a8� ❑B p87 0 °B a Sz• B e 70 7s 70 70 S3.Id • 3o I SW 353RD PL. �� a �e.9G GB GB G�•9/ GS•47 61.75' 80.31 vl4ys 2 '� 6 ° 0 Nm W � M) n/3' 3 n 0 4 N 24 h ° 42o ° N� �a° C N q N�, N` G4.a3 Gs.47 79.s7 tl la�° 6 / 11 oOZq 11' Qua ° tlrj¢0 a p 0010 y�5° Al 9m 3z 43W N Qj G5. v 0 1 K'^ ^,7 pe %�j a:) A p.@y 28-zz W. 300..'a m 13 ` .061 ZOAI 77.35 G8 6B 7P.47 x p t� 0 � �° ye9 3t.13w. w yD IQ 56 Nro x7.4/ s e a w 0 17 011 a y1 e5 r 4° 2-ry IF 0 N Q 14 A �} pp g �' G o` 77. 2Z 0 t 9/ q° ° 3 B/'!ter 43 5st rQf{ 15 I� i9 20�6 c $ v A N �. 16 �o von sa �, 18 17 N 73.48 �vST /a3 J0S /Z4.o3 � 8B•`F� G2.4 Q- ° 29 28 m V s 2, z0 29 0 29 19ozgo p 2. � _ � N 30 P °' p 0 °s00 a Bog ° 0 Z H P`� " 31 N 3Q QJ� 9028p s� G o (A Ate• Ih 4'' Qq i ° °-k¢ �" m a� 32 h 33 o a 34 0320 Q33p °3¢° O Ro 9T 'faB3 G 0 ZL 3.34- Heim' No L g904t$0313:?` Sg051I05�7 - lz �r — — T . (✓. L % Bp G0. 740 • /✓0 9p7� 7307030096-/° o COMIti U DEV I. f ij > f� i7.53 9-19-42W 93/.71 M In S 8 DU 08 1993 o �N _ � _ Z /4. 4-o eSURi�) 67-01 a57 p 1� r• � 12 91/20G/Co/ 2G 7 'E .Par t.A d77JB3 - 8 5/7v92/v-/2 B�1ZO70718 _ 30 3° 27 •7B s•P. �- = _ /50 9.s,79 i 50 ,_� N, Ih LoT / hi LOT 2 •� I �b TECHNICAL REVIEW COMMERCIAL Agenda Date: December 15, 1993 Subject: Butz Office Building\PRE93-0060 To: Community Development Review Committee From: Chris Ingham, Fire Marshal's Office WATER SUPPLIES FOR FIRE PROTECTION Existing fire hydrants on public streets are allowed to be considered as available for the project. Existing fire hydrants on adjacent properties shall not be considered available unless fire apparatus access roads extend between properties and easements are established to prevent obstructions of such roads. [UFC Appendix 111-131 It has been determined this project will require 1 hydrants. 1 existing hydrants are considered available to this project. This will require the addition of 0 hydrants for this project. [UFC Appendix III-B] FIRE DEPARTMENT ACCESS TO BUILDINGS Approved numbers or addresses shall be placed on all new and existing buildings in such a position as to be plainly visible and legible from the street or road fronting the property. Said numbers shall contrast with their background. [UFC 10.3011 ADDITIONAL COMMENTS: The Fire Marshal's office is requesting more information re ardin what type of work is to be conducted in the shop, THESE COMMENTS VALID FOR 180 DAYS FROM REVIEW AND ONLY FOR THE PLANS REVIEWED. Reviewed Review Date: pt- - P-- e- �r� � -�� R ��—�d� - - GC"GL�� i� �/��- - eOFA=-- A- 5 33530 1 ST WAY SOUTH • FEDERAL WAY, WASHINGTON 98003 May 23, 1994 Mr. Dick Tydings Interwest Development NW, Inc. 1425 - 22nd Street NW, Suite E Auburn, WA 98001 RE: SPR94-0006 - BUTZ OFFICE BUILDING 35406 21ST AVE SW, FEDERAL WAY, WA Dear Mr. Tydings: The city's Community Development Review Committee (DRC) has completed an initial technical review of the above referenced proposal. Following is a list of requirements relative to site plan requirements, landscape plan design, and construction elements applicable to your project. Planning Department: Contact Deb Barker at 661-4103 1. Site Plan Approval Requirements: a. Drawing requirements must be provided as noted below: 1. The square footage of the site needs to be shown. 2. Complete dimensions of parking stalls and drive aisles must be provided along with any driveway within 150 feet of the site. 3. Site coverage of structures, total impervious area, and landscape area, expressed as a percentage of the site, must be provided. 4. Pursuant to Federal Way City Code (FWCC 22-1445), sidewalks along the building shall be a minimum of five feet in width. Pedestrian access connecting the abutting street to interior sidewalks must also be provided. 5. Distances between the proposed structure and existing off site structures within 150 feet must be provided. 6. Existing and proposed easements must be shown. 7. The site plan and the floor plan do not reflect the same building footprint. The floor plan has a 5' x 8' mechanical room on the north side of the building. This has not been depicted on the site plan; north of the building is a future building pad. This discrepancy must be resolved. Mr. Dick Tydings May 23, 1994 Page 2 2. Landscaping: a. An approved landscape plan is required prior to final site plan approval. While the submitted landscape plan meets the general intent of the perimeter landscape code requirements, there are several features that must be amended as follows: 1. Significant trees - Pursuant to FWCC section 22-1568(c)(2) a and b, the applicant shall submit a tree retention plan concurrent with the first permit application for the development. The plan shall include a tree survey or cluster survey which identifies significant trees and a plan for retention, removal transplanting, or replacement of significant trees. The percentages retained or replaced trees shall also be identified. 2. Interior lot landscaping - Pursuant to FWCC section 22-1567(b)(1)(a)(i), twenty square feet of interior parking lot landscaping shall be provided for 40 parking stalls or less. The proposal includes 13 parking stalls which requires 260 square feet of interior lot landscaping. The submitted plans do not contain any of the required interior parking lot landscaping. Pursuant to FWCC 22-1567 (c), landscape islands shall be provided at the end of all rows of parking, for separation buffering between loading doors or maneuvering areas, and parking areas or stalls, and dispersed throughout the interior parking area in a manner to reduce visual impact of the parking lot. Interior lot landscape islands shall be a minimum of 64 square feet, and a minimum width of six feet at the narrowest point for islands at the end of 90 degree parking rows. Type IV landscaping shall be provided in the interior lot islands. 3. Street Trees - Street trees, per FWCC section 22-1525, have not been shown as part of the proposal on the landscape plan. 4. Parking Area/Screening for Rights -of -Way - Parking areas adjacent to the public right-of-way shall be screened pursuant to FWCC section 22-1567 (e). The proposed screening method has not been identified. 5. Foundation Landscaping - Pursuant to FWCC section 22-1564(v), foundation landscaping is encouraged for all development to reduce the scale, bulk, and height of structures. 6. FWCC Section 22-1570 provides for flexibility within landscape designs. The Director of Community Development has authority to modify specific requirements or impose additional requirements in unique or special landscape circumstances to assure stated purpose of the section is met. The applicant may request a modification of landscape requirements. A modification may be granted subject to Mr. Dick Tydings May 23, 1994 Page 3 the criteria listed in FWCC section 22-1570(b) through (i). Landscape modification requests may precede landscape resubmittals. Any modification request should be directed to my attention. 3. Garbage/Recycling Facilities: a. Pursuant to FWCC section 22-949, storage areas for garbage and recycling receptacles for material generated on the site shall be incorporated into the designs for commercial buildings. This project is not exempt from the requirements of this section and garbage/recycling facilities that meet code requirements must be provided. 4. Other Requirements: a. A sign permit application is enclosed. The sign category for this site is D. Any questions about sign requirements should be directed to Richard Cottage, Sign Code Compliance Officer, at 661-4017. b. Site improvement bonds are required prior to issuance of the building permit. Associated maintenance bonds will be required prior to acceptance of construction and issuance of a Certificate of Occupancy. Enclosed is a bond quantities price schedule and worksheet for your convenience. c. Cumulative Development Requirements - Upon completion of the proposed office building, this site will contain more than 10,000 square feet of undeveloped land. The applicant should be advised that subsequent development may require environmental review pursuant to FWCC Chapter 18, Environmental Protection. Cumulative impacts to the entire site will be analyzed. Public Works: Contact Skip Tullock at 661-4132 Public Works review of the proposed office building has begun. The following information needs to be provided: 1. The existing contours as well as the proposed grades need to be based on KCAS or NGVD- 29 datum with the benchmark shown. 2. The width of 21st Avenue Southwest needs to be depicted. 3. It appears that the proposed biofiltration swale will need to be relocated since it will interfere with any future extension of the sewer main located on the north side of the Mr. Dick Tydings May 23, 1994 Page 4 property. In addition, an access road will need to be provided adjacent to the north half of the swale. 4. A standard drive approach needs to be provided in lieu of the existing curb cut shown on the drawings. This should be a maximum of 30 feet in width. 5. The oil/water separation structure needs to be installed upstream of the biofiltration swale. 6. Public Works December 16, 1993, pre -application comment #5 is still applicable: "Since the proposed building site is large enough to be subdivided, the following items should be addressed: 1. The site's drive approach location as it relates to future public roads or on -site driveways. 2. The use of a joint drive approach as a way of limiting curb cuts. 3. Providing future connections between parking lots of adjacent properties to eliminate ingress and egress (from these properties) to 21st Avenue SW." Federal Way Water and Sewer: Contact Rick Gilmore at 941-2288 1. Water: As stated in the December 16, 1993, pre -application response, water is available by direct connection within 21st Avenue Southwest. Developer extension permits are required. 2. The sewers are located adjacent to the north property line of the proposed development. The developer shall extend these sewer facilities to the southern property line of the development as a conditions of sewer connection. The sewer extension easement must be 15 feet wide and set 10 feet from the building for construction clearance. This easement must be depicted on the site plan. 3. The bioswale should not be placed in the sewer easement. King County Fire District, #39: Contact Chris Ingham at 946-7242 The enclosed memorandum dated December 2, 1993, from Pat Kettenring to Lori Schill, still applies to this project. Mr. Dick Tydings May 23, 1994 Page 5 Building Division: Contact K.C. Ellis at 661-4123 Requirements for the building permit application have been listed on the enclosed Building Section Pre -development Information Checklist dated April 27, 1994. To assure that your permit proceeds in a timely manner, it is in your best interest to submit a complete package of any required additional information as soon as possible. Permits requiring additional information or resubmittals are generally handled on a first come/first serve basis. The longer time it takes to receive required resubmittals, the greater the potential for other projects to be processed before yours. Please contact me, or another appropriate staff person, if you have any questions at this time. Since ly, Deb Barker Associate Planner enc: FWCC Article Maintenance Quantities Sign Permit Application FWCC 22-949 FWCC 22-1445 Public Works Pre -Application Memorandum Fire District Pre -Application Memorandum Building Division Checklist c: Skip Tullock, Engineering Plans Reviewer K.C. Ellis, Lead Plans Examiner Richard Cottage, Code Compliance Officer Chris Ingham, Federal Way Fire District #39 Rick Gilmore, Federal Way Water & Sewer District spAbutzsp2Jir --_ ` __ _--------_ __ --- - - -------- ----------- - ' -cw F Cf- rV -- --- -------- COMMUNITY DEVELOPMENT TECHNICAL REVIEW COMMITTEE TO: TODAY' S DATE: PROJECT PLANNER: PLEASE RESPOND BY: FILE NUMBER: PROJECT NAME: PROJECT ADDRESS: PROJECT DESCRIPTION: APPLICANT: OWNER: SEPA: Federal Way Water and Sewer King County Fire District Building Division Land Use Division Public Works April 13, 1994 Deb Barker, Planning Technician 661-4103 April 28, 1994 SPR 94-0006 Butz Office Building 35406 21st Ave SW, Federal Way Construct a 1,920 square foot wood framed mixed use office building on street side of 35,116 square foot site fronting 21st Avenue SW. 13 parking spaces proposed. Project reviewed under PRE 93- 0060, with Lori Schill, Dec. 1993. Interwest Development NW Inc. 1425 22nd St NW, Suite E Auburn, WA 98001 Agent: Dick Tydings 939-9787 Ron Butz (Replica Company) 1911 SW Campus Drive #353 952-6155 Not required. (Under 4000 square feet, less than 20 parking spaces proposed.) Site Plan Review Analysis Work Sheet File Number- 6Tp— qq �� `e` 9 Reviewed By/ I Intel Site Address, 3S`d T � A Comp Plan Designation: Zone Designation/Kroll Page: 'TO Use Classification/Citation Number: — t/ S' � �J.a&_rwce DO Legal Lo Lot ize. ReviewProcess- Aal; � Notice of app/notice of decision: Environmentally Sensitive Areas: Regulated Slop.. Stream 0 h- Lake MA - Wetlands Shoreline A)A' Other -ALk SEPA exempt/not exempt: (verify cumulative impact, total stall count, total b iiding area, waterfront) UPR SEPA C7. � rL Filing Fees SPRc ( : ) Required Yards (required/proposed):f Front Side/Rear r� r !�% ' ;; is '� "1 /0 '51,0,,� � 5 + cv h U, l---�fi' � 0JL , Improvements in required (structures, see Sec. 22-1133) t-� A (driveways and parking areas, see Sec. 22-1135) 1 Lot Coverage (sly/proposed): i (do count outdoor use or storage area if used more than 2 mos/year,do not count access esmt. if for 2 or more lots) Building Height (allowed/proposed): Parking (required/proposed/compact ratio): � r v / )�e,L = / 2 30 L Special Notes (from zoning code): C2 �i 4 h w .:9n I fV ,t . l �O �✓ i I i Fences, screening of outside storage areas: t . Parking: 1,0 Number of stalls (required/provided) Stall Geometry and drive aisle width Location Setbacks VfLOG 2 z . G Curbing and sidewalks ir-m ii re vt Cu v 6-, on 4w m i-Ln e ! - Backing onto streetl ^4�r. Street used in circulation pattern Surface materials Landscaping: Requirements (perimeter landscaping, adjacent use, zoning) South EG1 '-TLI G� Fast S D` West :� Parking Lot Landscaping I `1P�- ��y' -210 Required -interior lands .�WCG 2Z-iS�*,�� yL ��Xz 2c�o r gEgE,s�4i berr �'6YlakdlScc i tya Landscape Irrigation > 2012 10-w"I d rk-T nc) 2 V-ow 3' re,> e vj tb s-O�,z avI44 �b 1Significant tree ' � '.Z : �Y �`' `�` r D-V-4-7 C Landscape Bonds 2 Z -[ Stoq - pe.,44 sit( S be Pv,� 7 Requested modifications LOWL '% d V r-e > I . jw o f al j v f: - Li:Cd+t �t :r r sr r, s v Miscellaneous: F r _ Facade Modulation r �- J • P } ^ CL;cm `3 Recycling provisions (not in required yard or buffer) /a m� Lightinga Outdoor use/storage areas :r own (6 ft. solid fence, not in required buffer) Rooftop screening 2Q tL'`"�'� Signage (requires separate permits Non -Conformance: ui not requiredy ct� bfypu-sf- u . 0 Immediate compliance issues a 1 TTce, vY%A -Re-,-f —r-s�- ...., L 4..C:sy sy�'•fL.rj��-- �`� �VL.� �'`4�.�. ��''w y�.y.� -6'en_t l._��F" f .. �"�`,, Parkin Signs ' -O i Buffer 1 Vl &k5 leil OK Recycling (if structural alteration or increase in gross floor area.) Any other non-conformance (.m "'t'J Discussion: 3 Notes/Issues• SPR\P1.A1VR V.FRM 4/25/94 1 - -- ..... yce �-TILiSva.� Public Works Office Memorandum, City of Federal Way TO: Deb Barker FROM: Skip Tullock DATE: May 2, 1994 SUBJECT: SPR94-0006, Butz Proposed Office Building, 35406 21st Avenue SW The site plan for the subject project has been reviewed and the following comments are provided: 1. The area of the site needs to be shown. � _ �--- The impervious area needs to be listed as a percentage of the gross site area. 4 3. Existing contours as well as proposed grades need to be based on KCAS or NGVD-29 datum (benchmark needs to be shown also). 4 Existing as well as proposed easements need to be shown. �Sr� The width of 21st Avenue SW (the existing street abutting the property) needs to be shown. 6. All existing utilities (water, sewer, storm, etc.) and fire hydrant locations need to be shown. 7. It appears that the proposed biofiltration Swale will need to be relocated since it will interfere with any future extension of the sewer main located on the north side of the property. In addition, an access road will need to be provided adjacent to the north half of the swale. �`,�� A standard drive approach needs to be provided (30 foot maximum width) in lieu of the existing curb cut shown on the drawings. The oil/water separation structure needs to be installed w upstream of the biofiltration swale. 0. It appears that item 5 (in our original pre --application comments) as it relates to the future subdivision of the site has not been adequately addressed. PFN-DEVELOPMENT INFORMATION �4TDERAL WAY BUILDING SECTIC 661-4118 6-"' z�Z PROJECT NAME OCCUPANCY TYPE CONSTRUCTION 1. Submit with completed application for permit, seven complete sets of plans of 24"x36" maximum dimension (include architectural, structural, electrical, drainage, utilities, and landscaping). Provide three each 8'/2"xll" and three full size site plans for addressing multiple building sites. 2. At submittal provide two sets of structural calculations prepared by a professional engineer, registered in the State of Washington. 3. At submittal provide two copies of soil investigations and reports, as specified in Chapter 29 of the Uniform Building Code. �4. At submittal provide two sets of energy code calculations, including lighting budget. Washington State Energy Code (1991). Al J� F-(, tR�L, tie, Xrr() I / I �l 5. Provide two copies of King County Health Department approved drawings. 6. At the time of submittal, those regulations which are currently in effect shall be applicable to all project plans and specifications. The City of Federal Way has currently adopted all Uniform Codes, 1991 editions. 7. Washington State Disability Standards apply (WAC 51-20). 48. Special inspection by an approved testing laboratory is required for site welding, high -strength bolting, piling operations, sprayed -on fireproofing, structural masonry, and cast -in -place concrete. Include testing lab selection and personnel credentials with building permit submittal for Building Section approval prior to construction (must be WABO certified agency and inspectors on January 1, 1994). 9. Separate permits are required for demolition, signs, rack storage, rockeries, etc., refer to Washington State Department of L & I for electrical permits. Plumbing and mechanical should be included on the main application for permits, described in #1 above. Z10. Revisions to submitted drawings will be subject to additional plan review fees, if on larger sheets than 81/x "x11". Minimum estimated fireflow (gpm) _ 12. Provide TWO FULL SIZE SITE PLANS APPROVED BY THE FEDERAL WAY POSTMASTER, showing approved locations, when installing gang -type mail boxes. �13. No building or portion of a building shall be occupied or used for storage prior to the issuance of the CERTIFICATE OF OCCUPANCY. 14. No work shall start prior to the issuance of the permit. 15. Other: PREPARED BY LI - Z-7 y DATE P"DEV.F M COMMUNITY DEVELOPMENT TECHNICAL REVIEW COMMITTEE AGENDA OF: April 28, 1994 ATTN: Deb Barker Planning Technician FROM: Federal Way Water and Sewer SUBJECT: Agenda Item No. 6 - Butz Office Building -- Site Plan Review COMMENTS: General: Our comments submitted at the preapplication meeting are still applicable. In addition, please show on -site water and sewer improvements to confirm there is no conflict with proposed drainage improvements. Sewer: We will want sewer extended to the south property line in an easement 15 feet wide, set 10 feet off the building for construction clearance. We would prefer to have the bioswale located outside of our easement. By: Date:U KING COUNTY FIRE PROTECTION DISTRICT NO. 39 FEDERAL WAY FIRE DEPARTMENT 31617 - 1ST AVENUE SO. FEDERAL WAY, WASHINGTON 96003 April 27, 1994 To: Community Development Review Committee RE: Butz Office Building/ SPR94-0006 3 The Fire Marshal's Office comments dated December 15, 199X still apply to this project. Respectfully Submitted, Chris A. Ingham Fire Marshal's Office Business Phones: Seattle 206-839-6234 Tacoma 206-927-3118 FAX: 206-946-2086 RFC VOW MXF:R— APR u i BUILDING DEP7. APPLICATION NO. _"�_/ 4q CC) 0 (Q "TE" LAND USE APPLICATION DEPARTMENT OF COMMUNITY DEVELOPMENT 335301at Way South ♦ Federal Way, WA 98003 Date I p J m 9 t Agent Name of ApplicantToi - 1) � � �[�d, 64 9 �h_t Address-aZ S7LG(J hone 939' 7 Signature Owner Name/Address (if different than applicant) Property Location — Kroll s one P4 Gl 1- z3_6z Legal Description Project Description Parcel Number(s) A4 A O'S _;� 10 �!) -4qU�5-2-, z Type of Permit Required: SEPA Notice Sign Checklist Mailed Board k_ Site Plan Re ie�v R R Land Surface Modification R R Boundary Line Adjustment Binding Site Plan R R R Short Subdivision Subdivision R R R Shoreline R R Variance R R R Conditional Use R R R Use - Process I R R Use - Process II R R R Use - Process III R R R Quasi -Judicial Rezone R R R Variance R* R R Comp. Plan/Rezone R R Annexation R R Lot Line Elimination *Pre -Application Meeting R =Required * =Optional by City e January 4, 1994 Ron Butz 1911 SW Campus Drive #353 Federal Way, WA 98003 RE. PRE APPLICATION #93-0060, BU77 OFFICE BUILDING 35406 21 ST AVENUE SW, FEDERAL WAY Dear Mr. Butz: This letter summarizes our pre -application conference on December 30, 1993, at which time members of the Development Review Committee discussed development requirements as they will apply to your proposal. Those requirements are provided below or are enclosed. LAND USE DIVISION (Lori Michaelson Schill, 661-4019) Review process: Office buildings in the Professional Office (PO) zoning district are subject to Site Plan Review. An information bulletin on site plan review was provided to you at the meeting. You were also given a copy of the general zoning regulations that apply to offices in the PO zone (FWCC Sec. 22-696). The 1994 fee for site plan review is $1,160. A master application form (enclosed) is required along with the site plan submittal package. You should allow approximately sixty (60) days for completion of site plan review. 2. State Environmental Policy Act (SEPA): The project proposes a 1,920 square foot, single story office building with 7 parking stalls. The scope of the project does not meet any of the SEPA thresholds, so the project is exempt. Therefore, a SEPA checklist will not be required. 3. Landscape Plan: A preliminary landscape plan is required as part of the site plan submittal, prepared by a licensed landscape architect in accordance with FWCC Article XVII, Landscaping (provided to you at the meeting). In accordance with Article XVII, Sec. 11-1566, perimeter landscape buffers are required as follows: ■ Twenty (20) feet of Type III at the west property line along 21st Avenue SW. ■ Five (5) feet of Type III at the south property line. ■ Ten (10) feet of Type I at the north and east property lines. Ron Butz January 5, 1994 Page 2 of 3 LAND USE DIVISION, cont'd. 3. Landscaping (cont'd): Interior parking lot landscaping must be provided in accordance with Sec. 22-1567, Parking lot landscaping. Also, street trees are required adjacent to 21st Avenue SW (FWCC Sec 22-1525, Local Rights of Way). Opportunities to modify landscape requirements are available pursuant Sec. 22-1570, Modification options. Perimeter landscape buffers on the portion of the lot that is to remain undeveloped may be retained in a native, pre -developed state, providing the existing vegetation meets the intent of buffer requirements. Supplemental plantings to the existing vegetation may be required. 4. Sign category "D" will apply to the project (FWCC 22-696). A sign permit must be secured under separate application. Please contact Richard Cottage, Code Compliance Officer, 661-4017, with any questions about signage. 5. The current proposal should be compatible with any future development plans as they relate to site design, traffic circulation, utilities and surface water faciltiies. It is understood that there is no intent to subdivide the parcel. For your information, the subdivision of commercial property requires approval of a "Binding Site Plan" and is currently reviewed under "Process III". Process III decisions are issued by the City Council following a public hearing and recommendation by the Hearing Examiner. PUBLIC WORKS DEPARTMENT (Ron Garrow, 661-4137) Refer to enclosed Public Works memorandum. BUILDING DIVISION (K.C. Ellis, 661-4123). Refer to enclosed memorandum. FEDERAL WAY WATER AND SEWER DISTRICT (Rick Gilmore, 941-1516) Refer to enclosed memorandum. FIRE DISTRICT #30 (Pat Kettenring, 839-6234) Refer to enclosed memorandum. Ron Butz January 4, 1994 Page 3 of 3 Also enclosed is a copy of the sign-up sheet from the meeting, and the city's guidelines for parking standards that you had requested. Thank you for participating in the pre -application process. As you know, this is a perliminary review only, and it does not take the place of a full review of the formal application. Should you have any questions, please contact me at 661-4019, or other staff person as appropriate. Sincerely, Lori Michaelson Schill Associate Planner c: Kathy McClung, Land Use Administrator Ron Garrow, Senior Development Engineer Skip Tullock, Engineering Plans Reviewer encl: master application form Public Works comments Building Division comments Federal Way Water and Sewer District comments Fire Department comments signup sheet from meeting parking standards chart rm